Find the sections that cite this one
curl --request GET \
--url https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}{
"section": {
"actId": "<string>",
"citation": "<string>",
"citationShort": "<string>",
"title": "<string>",
"corpusType": "<string>",
"state": "<string>",
"source": "sct",
"year": 123,
"relevanceScore": 123,
"excerpt": "",
"body": "(a) If within a reasonable time after written or oral notice...",
"titleNumber": "<string>",
"titleName": "<string>",
"chapter": "<string>",
"chapterName": "<string>",
"sectionNumber": "<string>",
"sectionTitle": "<string>",
"displayPath": "<string>",
"breadcrumb": [
{}
],
"parent": {},
"subchapter": "<string>",
"subchapterName": "<string>",
"part": "<string>",
"partName": "<string>",
"subpart": "<string>",
"subpartName": "<string>",
"popularName": "<string>",
"actStatus": "<string>",
"goodLawStatus": "<string>",
"currencyNote": "<string>",
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"issueDateRaw": "<string>",
"crossReferencesCfr": [
"<string>"
],
"crossReferencesUsc": [
"<string>"
],
"statutoryAuthority": [
{}
],
"implementingRegulations": [
{}
],
"frRegulationIdNumbers": [
"<string>"
],
"frDocketIds": [
"<string>"
],
"frEffectiveOn": "<string>",
"frCommentsCloseOn": "<string>",
"frSignificant": true,
"frCorrectionOf": "<string>",
"frCorrections": [
"<string>"
],
"frRegulationsDotGovUrl": "<string>",
"frRelatedDocuments": [
{
"actId": "<string>",
"citation": "<string>",
"title": "<string>",
"documentType": "<string>",
"publicationDate": "<string>"
}
],
"subject": "<string>",
"rescindedOn": "2016-07-01",
"rescindedOnRaw": "<string>",
"sourceCredit": "<string>",
"amendmentYears": [
123
],
"lastAmendedYear": 123,
"amendmentsCount": 123,
"currentThrough": "<string>",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"amendmentHistory": [
"<string>"
],
"sourceNote": "<string>",
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"<string>"
],
"history": "<string>",
"supersededBy": "<string>",
"supersedes": "<string>",
"ruleSet": "<string>",
"publicLaws": [
"<string>"
],
"federalRegisterCitations": [
"<string>"
],
"granuleId": "<string>",
"packageId": "<string>",
"htmlUrl": "<string>",
"pdfUrl": "<string>",
"xmlUrl": "<string>",
"textUrl": "<string>",
"docxUrl": "<string>",
"stateHtmlUrl": "<string>",
"govInfoHtmlUrl": "<string>",
"govInfoPdfUrl": "<string>",
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"signingDateRaw": "<string>",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"lastAmendedDateRaw": "<string>",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"reviewDateRaw": "<string>",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"releaseDateRaw": "<string>",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"licenseNote": "MIT (reglab/statecodes)",
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"committeeNote": "<string>",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"publicationDateRaw": "<string>",
"publicLawCites": [
{}
],
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
},
"citers": [
{
"actId": "<string>",
"citation": "<string>",
"citationShort": "<string>",
"title": "<string>",
"corpusType": "<string>",
"state": "<string>",
"source": "sct",
"year": 123,
"relevanceScore": 123,
"excerpt": "",
"body": "(a) If within a reasonable time after written or oral notice...",
"titleNumber": "<string>",
"titleName": "<string>",
"chapter": "<string>",
"chapterName": "<string>",
"sectionNumber": "<string>",
"sectionTitle": "<string>",
"displayPath": "<string>",
"breadcrumb": [
{}
],
"parent": {},
"subchapter": "<string>",
"subchapterName": "<string>",
"part": "<string>",
"partName": "<string>",
"subpart": "<string>",
"subpartName": "<string>",
"popularName": "<string>",
"actStatus": "<string>",
"goodLawStatus": "<string>",
"currencyNote": "<string>",
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"issueDateRaw": "<string>",
"crossReferencesCfr": [
"<string>"
],
"crossReferencesUsc": [
"<string>"
],
"statutoryAuthority": [
{}
],
"implementingRegulations": [
{}
],
"frRegulationIdNumbers": [
"<string>"
],
"frDocketIds": [
"<string>"
],
"frEffectiveOn": "<string>",
"frCommentsCloseOn": "<string>",
"frSignificant": true,
"frCorrectionOf": "<string>",
"frCorrections": [
"<string>"
],
"frRegulationsDotGovUrl": "<string>",
"frRelatedDocuments": [
{
"actId": "<string>",
"citation": "<string>",
"title": "<string>",
"documentType": "<string>",
"publicationDate": "<string>"
}
],
"subject": "<string>",
"rescindedOn": "2016-07-01",
"rescindedOnRaw": "<string>",
"sourceCredit": "<string>",
"amendmentYears": [
123
],
"lastAmendedYear": 123,
"amendmentsCount": 123,
"currentThrough": "<string>",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"amendmentHistory": [
"<string>"
],
"sourceNote": "<string>",
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"<string>"
],
"history": "<string>",
"supersededBy": "<string>",
"supersedes": "<string>",
"ruleSet": "<string>",
"publicLaws": [
"<string>"
],
"federalRegisterCitations": [
"<string>"
],
"granuleId": "<string>",
"packageId": "<string>",
"htmlUrl": "<string>",
"pdfUrl": "<string>",
"xmlUrl": "<string>",
"textUrl": "<string>",
"docxUrl": "<string>",
"stateHtmlUrl": "<string>",
"govInfoHtmlUrl": "<string>",
"govInfoPdfUrl": "<string>",
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"signingDateRaw": "<string>",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"lastAmendedDateRaw": "<string>",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"reviewDateRaw": "<string>",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"releaseDateRaw": "<string>",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"licenseNote": "MIT (reglab/statecodes)",
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"committeeNote": "<string>",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"publicationDateRaw": "<string>",
"publicLawCites": [
{}
],
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
}
],
"total": 17,
"truncated": false,
"note": "<string>",
"resolvedFrom": {
"input": "26 U.S.C. § 1",
"actId": "USC_T26_C1_S1",
"via": "citation",
"subsection": "(h)(11)"
},
"processingTimeMs": 74.2,
"creditsConsumed": 2
}{
"detail": "Insufficient API credits.",
"errors": [
{
"loc": [
"body",
"corpusType"
],
"msg": "Input should be 'USC', 'CFR' or 'STATE'",
"type": "literal_error"
}
]
}{
"detail": "Insufficient API credits.",
"errors": [
{
"loc": [
"body",
"corpusType"
],
"msg": "Input should be 'USC', 'CFR' or 'STATE'",
"type": "literal_error"
}
]
}{
"detail": "Section not found. This id does not exist, but the section does, ...",
"actId": "<string>",
"reason": "assembled_id",
"didYouMean": [
"USC_T26_C1_S1"
]
}{
"detail": [
{
"loc": [
"<string>"
],
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"type": "<string>",
"input": "<unknown>",
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}
]
}{
"detail": "Insufficient API credits.",
"errors": [
{
"loc": [
"body",
"corpusType"
],
"msg": "Input should be 'USC', 'CFR' or 'STATE'",
"type": "literal_error"
}
]
}Find the sections that cite this one
The USC and CFR sections whose text cross-references a given section.
Cost: 2 credits. Not-found, failed lookups, and sections in a corpus with no cross-reference index are not charged.
A section lookup tells you what a section cites; this is the other direction, which provisions elsewhere in the code depend on this one. That is the question behind “if this section changes, what else is affected”.
Results are one row per citing section, in statutory order, never one row per matching chunk.
Scope: USC and CFR. State codes and Federal Register rules carry no
section-level cross-reference index, so a section from either returns an empty
list with a note explaining why, and is refunded. When note is null, an
empty citers is a real answer: plenty of sections are cited by nothing.
Completeness: this reads references as the publisher wrote them, including the title-relative form a section uses for its own neighbours. A citation that the source never recorded in machine-readable form cannot appear here, so treat a result as evidence of a citation rather than proof there are no others.
GET
/
api
/
v1
/
us
/
statutes
/
section
/
{act_id}
/
cited-by
Find the sections that cite this one
curl --request GET \
--url https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by \
--header 'Authorization: Bearer <token>'import requests
url = "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.vaquill.ai/api/v1/us/statutes/section/{act_id}/cited-by"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}{
"section": {
"actId": "<string>",
"citation": "<string>",
"citationShort": "<string>",
"title": "<string>",
"corpusType": "<string>",
"state": "<string>",
"source": "sct",
"year": 123,
"relevanceScore": 123,
"excerpt": "",
"body": "(a) If within a reasonable time after written or oral notice...",
"titleNumber": "<string>",
"titleName": "<string>",
"chapter": "<string>",
"chapterName": "<string>",
"sectionNumber": "<string>",
"sectionTitle": "<string>",
"displayPath": "<string>",
"breadcrumb": [
{}
],
"parent": {},
"subchapter": "<string>",
"subchapterName": "<string>",
"part": "<string>",
"partName": "<string>",
"subpart": "<string>",
"subpartName": "<string>",
"popularName": "<string>",
"actStatus": "<string>",
"goodLawStatus": "<string>",
"currencyNote": "<string>",
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"issueDateRaw": "<string>",
"crossReferencesCfr": [
"<string>"
],
"crossReferencesUsc": [
"<string>"
],
"statutoryAuthority": [
{}
],
"implementingRegulations": [
{}
],
"frRegulationIdNumbers": [
"<string>"
],
"frDocketIds": [
"<string>"
],
"frEffectiveOn": "<string>",
"frCommentsCloseOn": "<string>",
"frSignificant": true,
"frCorrectionOf": "<string>",
"frCorrections": [
"<string>"
],
"frRegulationsDotGovUrl": "<string>",
"frRelatedDocuments": [
{
"actId": "<string>",
"citation": "<string>",
"title": "<string>",
"documentType": "<string>",
"publicationDate": "<string>"
}
],
"subject": "<string>",
"rescindedOn": "2016-07-01",
"rescindedOnRaw": "<string>",
"sourceCredit": "<string>",
"amendmentYears": [
123
],
"lastAmendedYear": 123,
"amendmentsCount": 123,
"currentThrough": "<string>",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"amendmentHistory": [
"<string>"
],
"sourceNote": "<string>",
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"<string>"
],
"history": "<string>",
"supersededBy": "<string>",
"supersedes": "<string>",
"ruleSet": "<string>",
"publicLaws": [
"<string>"
],
"federalRegisterCitations": [
"<string>"
],
"granuleId": "<string>",
"packageId": "<string>",
"htmlUrl": "<string>",
"pdfUrl": "<string>",
"xmlUrl": "<string>",
"textUrl": "<string>",
"docxUrl": "<string>",
"stateHtmlUrl": "<string>",
"govInfoHtmlUrl": "<string>",
"govInfoPdfUrl": "<string>",
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"signingDateRaw": "<string>",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"lastAmendedDateRaw": "<string>",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"reviewDateRaw": "<string>",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"releaseDateRaw": "<string>",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"licenseNote": "MIT (reglab/statecodes)",
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"committeeNote": "<string>",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"publicationDateRaw": "<string>",
"publicLawCites": [
{}
],
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
},
"citers": [
{
"actId": "<string>",
"citation": "<string>",
"citationShort": "<string>",
"title": "<string>",
"corpusType": "<string>",
"state": "<string>",
"source": "sct",
"year": 123,
"relevanceScore": 123,
"excerpt": "",
"body": "(a) If within a reasonable time after written or oral notice...",
"titleNumber": "<string>",
"titleName": "<string>",
"chapter": "<string>",
"chapterName": "<string>",
"sectionNumber": "<string>",
"sectionTitle": "<string>",
"displayPath": "<string>",
"breadcrumb": [
{}
],
"parent": {},
"subchapter": "<string>",
"subchapterName": "<string>",
"part": "<string>",
"partName": "<string>",
"subpart": "<string>",
"subpartName": "<string>",
"popularName": "<string>",
"actStatus": "<string>",
"goodLawStatus": "<string>",
"currencyNote": "<string>",
"renumberedTo": "self:4651",
"renumberedToLabel": "section 10105 of Title 34",
"transferredTo": "34:10105",
"transferredToLabel": "section 10105 of Title 34",
"issueDate": "1999-05-25",
"issueDateRaw": "<string>",
"crossReferencesCfr": [
"<string>"
],
"crossReferencesUsc": [
"<string>"
],
"statutoryAuthority": [
{}
],
"implementingRegulations": [
{}
],
"frRegulationIdNumbers": [
"<string>"
],
"frDocketIds": [
"<string>"
],
"frEffectiveOn": "<string>",
"frCommentsCloseOn": "<string>",
"frSignificant": true,
"frCorrectionOf": "<string>",
"frCorrections": [
"<string>"
],
"frRegulationsDotGovUrl": "<string>",
"frRelatedDocuments": [
{
"actId": "<string>",
"citation": "<string>",
"title": "<string>",
"documentType": "<string>",
"publicationDate": "<string>"
}
],
"subject": "<string>",
"rescindedOn": "2016-07-01",
"rescindedOnRaw": "<string>",
"sourceCredit": "<string>",
"amendmentYears": [
123
],
"lastAmendedYear": 123,
"amendmentsCount": 123,
"currentThrough": "<string>",
"pendingAdoptions": [
{
"agency": "Department of Financial Services",
"effectiveDate": "2026-09-23",
"idNo": "DFS-23-26-00013-A",
"issueDate": "2026-09-23",
"scope": "part"
}
],
"adoptedAfterCurrentThrough": true,
"amendmentHistory": [
"<string>"
],
"sourceNote": "<string>",
"effectiveDate": "2002-11-25",
"effectiveDateRaw": "September 8, 1916",
"historyEffectiveDate": "2009-06-19",
"priorEffectiveDates": [
"<string>"
],
"history": "<string>",
"supersededBy": "<string>",
"supersedes": "<string>",
"ruleSet": "<string>",
"publicLaws": [
"<string>"
],
"federalRegisterCitations": [
"<string>"
],
"granuleId": "<string>",
"packageId": "<string>",
"htmlUrl": "<string>",
"pdfUrl": "<string>",
"xmlUrl": "<string>",
"textUrl": "<string>",
"docxUrl": "<string>",
"stateHtmlUrl": "<string>",
"govInfoHtmlUrl": "<string>",
"govInfoPdfUrl": "<string>",
"abstract": "This regulation extends time-limited tolerances for pesticides.",
"agencies": [
"Environmental Protection Agency"
],
"agencySlugs": [
"environmental-protection-agency"
],
"topics": [
"Environmental protection",
"Pesticides and pests"
],
"documentTypeLabel": "Rule",
"documentSubtype": "Proclamation",
"action": "Final rule.",
"president": "George W. Bush",
"signingDate": "2026-04-02",
"signingDateRaw": "<string>",
"datesText": "This regulation is effective December 14, 2001.",
"frVolume": 66,
"frStartPage": 64768,
"frEndPage": 64775,
"wordCount": 6271,
"issuingAgency": "Pollution Control Board",
"adoptingCitations": [
"37 Ill. Reg. 16539"
],
"lawImplemented": "Section 4656.1, Public Resources Code",
"lastAmendedDate": "2013-10-04",
"lastAmendedDateRaw": "<string>",
"amendmentNote": "Amended at 37 Ill. Reg. 16539, effective October 4, 2013",
"currencyYear": 2025,
"reviewDate": "11/1/2028",
"reviewDateRaw": "<string>",
"originalEnactmentDate": "1934-06-27",
"originalEnactmentDateRaw": "June 27, 1934",
"releaseDate": "2018-06-14",
"releaseDateRaw": "<string>",
"documentNumber": "21-CA-211066",
"caseName": "Dunn-Edwards Corp.",
"forum": "Administrative Proceeding",
"court": "U.S. District Court for the District of Massachusetts",
"relatedDocuments": [
"Consent Order",
"Stipulation"
],
"settlementAmount": "$16,500",
"requesters": [
"Preece, Inc."
],
"program": "Old-Age and Survivors Insurance",
"languageCode": "es",
"volume": 1,
"articleNumber": "1",
"articleName": "Declaration of Rights",
"ruleSetCode": "NDSUPCTADMINR",
"edition": "2025",
"relatedCitations": [
"RCW 28A.150.290"
],
"supersessionActions": {
"modifies": [
"Rev. Proc. 2011-47"
]
},
"licenseNote": "MIT (reglab/statecodes)",
"subtitle": "11",
"subtitleName": "AIR QUALITY",
"publisherKey": "430000000310400000000000000000000",
"versionId": "11948",
"referencedShortTitles": [
"Driftnet Modernization and Bycatch Reduction Act"
],
"subjectNumber": "47",
"audience": "All Persons Engaged in Marketing",
"sourceCharStart": 263194,
"sourceCharEnd": 264198,
"alternateCitations": [
"4 L.P.R.A. § 2077"
],
"expirationDate": "2029-03-01",
"expirationDateRaw": "03-01-2029",
"committeeNote": "<string>",
"sourcePageStart": 114,
"sourcePageEnd": 114,
"displayLabel": "MPEP § 2165.03",
"publicationDate": "2001-12-14",
"publicationDateRaw": "<string>",
"publicLawCites": [
{}
],
"topLevelTitle": "Title 9: Criminal",
"externalUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists",
"sourceUrl": "https://www.mass.gov/regulations/240-CMR-200-licensure-of-cosmetologists"
}
],
"total": 17,
"truncated": false,
"note": "<string>",
"resolvedFrom": {
"input": "26 U.S.C. § 1",
"actId": "USC_T26_C1_S1",
"via": "citation",
"subsection": "(h)(11)"
},
"processingTimeMs": 74.2,
"creditsConsumed": 2
}{
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"errors": [
{
"loc": [
"body",
"corpusType"
],
"msg": "Input should be 'USC', 'CFR' or 'STATE'",
"type": "literal_error"
}
]
}{
"detail": "Insufficient API credits.",
"errors": [
{
"loc": [
"body",
"corpusType"
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"msg": "Input should be 'USC', 'CFR' or 'STATE'",
"type": "literal_error"
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]
}{
"detail": "Section not found. This id does not exist, but the section does, ...",
"actId": "<string>",
"reason": "assembled_id",
"didYouMean": [
"USC_T26_C1_S1"
]
}{
"detail": [
{
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"<string>"
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"msg": "<string>",
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}{
"detail": "Insufficient API credits.",
"errors": [
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}Authorizations
ApiKeyAuthApiKeyHeaderApiKeyQuery
API key issued from the developer dashboard. Pass as Authorization: Bearer vq_key_... (preferred).
Path Parameters
Section identifier, e.g. USC_T42_C21_S1983 (Title 42, Chapter 21, Section 1983, which a lawyer writes as 42 U.S.C. § 1983). Take it from a /us/statutes/search or /us/statutes/resolve result.
A citation also works here: 26 U.S.C. § 1, 42 USC 1983 or Cal. Civ. Code § 1950.5 is resolved with the same resolver /resolve uses, and the section is served. A citation costs this endpoint's price PLUS the /resolve price (2 credits), charged as its own line whether or not it resolves, exactly as /resolve charges; that is the same total as calling /resolve and then this endpoint, in one round trip. An exact act_id costs only this endpoint's price. When a citation resolves, or when the id only matched after surrounding whitespace, quotes or a trailing period were removed, the response carries resolvedFrom saying what your input was matched as. Check it the way you would check a /resolve answer. A citation containing / cannot travel in a URL path segment; resolve it with GET /us/statutes/resolve instead.
Do not assemble an id from a citation: the title and section are derivable, but the CHAPTER is not, so USC_T26_S1 misses. A miss returns 404 with reason and, where the section exists under another id, didYouMean.
State session laws (acts as enacted, ids starting SSL_) are not code sections: read them at /us/session-laws/{sessionLawId}.
Required string length:
3 - 200Example:
"USC_T42_C21_S1983"
Query Parameters
Maximum citing sections to return.
Required range:
1 <= x <= 100Example:
25
Response
The section plus the sections citing it.
Response for GET /us/statutes/section/{act_id}/cited-by.
The section you asked about.
Show child attributes
Show child attributes
Sections whose text cross-references this one, in statutory order. Empty is a real answer: plenty of sections are cited by nothing.
Show child attributes
Show child attributes
How many citing sections were returned. This is the size of citers, not a corpus-wide count: it is capped by limit.
Example:
17
True when more citing sections exist than limit allowed. Raise limit to see the rest.
Set only when the answer is not a real zero. Reverse citation is built on the cross-reference index, which exists for USC and CFR; for any other corpus this explains that the section is out of scope and the call is refunded. When it is null, an empty citers means nothing cites this section.
Null when the section is exactly the act_id you sent. Otherwise how your input was matched: a citation, or an act_id with transport damage (whitespace, quotes, a trailing period) removed.
Show child attributes
Show child attributes
Server-side time for this request in milliseconds, excluding network transit. Useful for spotting a slow query; not billed on.
Example:
74.2
Credits actually charged for this call. Read it rather than assuming the list price: failed and refunded work bills 0.
Example:
2
Last modified on October 9, 2026
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