34 U.S.C. § 21905

Voluntary participation

The minimum standards established under section 21904(a) of this title , and any other guidelines and programs established under section 21903 of this title , shall be adoptable on a voluntary basis only.

( Pub. L. 106–468, title II, § 205 , as added Pub. L. 115–401, § 2(5) , Dec. 31, 2018 , 132 Stat. 5341 .)