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42 U.S.C. 14306: State authorityText contains those laws in effect through Public Law 119-120 (October 7, 2026).
From Title 42-THE PUBLIC HEALTH AND WELFARECHAPTER 137-MANAGEMENT OF RECHARGEABLE BATTERIES AND BATTERIES CONTAINING MERCURY
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§14306. State authority

Nothing in this chapter shall be construed to prohibit a State from enacting and enforcing a standard or requirement that is identical to a standard or requirement established or promulgated under this chapter. Except as provided in sections 14322(e) and 14323 of this title, nothing in this chapter shall be construed to prohibit a State from enacting and enforcing a standard or requirement that is more stringent than a standard or requirement established or promulgated under this chapter.

( Pub. L. 104–142, § 7 , May 13, 1996 , 110 Stat. 1332 .)