---
kind: "section"
citation: "42 U.S.C. § 300x–66"
title: "42"
title_heading: "The Public Health and Welfare"
number: "300x–66"
heading: "Services for individuals with co-occurring disorders"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/300x-66"
units:
  - "Chapter 6A — Public Health Service"
  - "Subchapter XVII — Block Grants"
  - "Part B — Block Grants Regarding Mental Health and Substance Use"
  - "Subpart iii — general provisions"
---

# §300x–66. Services for individuals with co-occurring disorders


[States](/usc/42/201.md?p=f) may use funds available for [treatment](/usc/42/11851.md?p=11) under sections [300x](/usc/42/300x.md) and [300x–21](/usc/42/300x–21.md) of this title to treat persons with co-occurring [substance use disorders](/usc/42/300x–34.md?p=4) and mental disorders as long as funds available under such sections are used for the purposes for which they were authorized by law and can be tracked for accounting purposes.


## Source credit

(July 1, 1944, ch. 373, title XIX, § 1956, as added Pub. L. 106–310, div. B, title XXXIV, § 3407, Oct. 17, 2000, 114 Stat. 1222; amended Pub. L. 117–328, div. FF, title I, § 1241(a)(13), Dec. 29, 2022, 136 Stat. 5678.)

## Notes

### Editorial Notes

### Amendments

2022—Pub. L. 117–328 substituted “substance use disorders” for “substance abuse”.