United States Code, as recorded on Flare Reef (https://flarereef.flareforward.com/p/13)

December 22, 2023. Public Law 118-31, the National Defense Authorization Act for Fiscal Year 2024.
Title 39, Section 406: amended. Replaced “may authorize the use” with “shall authorize the use” in section 406 of title 39.
Official text: https://www.govinfo.gov/app/details/PLAW-118publ31
The commit: https://github.com/lexifina/united-states-law/commit/fbba8de21956e0042f9997aab39aeae77a285ab0
Lexifina's page: https://lexifina.com/watch/us-code/laws/118-31
Permanent record: https://flarereef.flareforward.com/n/17