Adds a new sentence at the end of 49 U.S.C. 46307 establishing an enhanced penalty for second or subsequent offenses under that section: imprisonment for not more than 5 years, a fine under title 18, or both.

Amends subsection (b) of 34 U.S.C. 10381 by inserting a new paragraph (23) authorizing the use of grant funds to purchase and operate unmanned aircraft systems (as defined in 49 U.S.C. 44801) to benefit public safety; redesignates existing paragraphs (23) and (24) as (24) and (25), respectively; and updates a cross-reference in the redesignated paragraph (24) from '(22)' to '(23)'.

Amends 34 U.S.C. 10152(a)(1) by adding two new subparagraphs (J) and (K) to the list of eligible programs for grants under that subsection, authorizing grants to be used to purchase and operate unmanned aircraft systems and certain counter-UAS systems.

Amends 6 U.S.C. 124n to expand authorities, add State/local/Tribal/territorial authority (with required training/certification and oversight), modify permitted mitigation means, add forfeiture rule for State seizures, impose notification and reporting requirements, set expirations for authorities, clarify applicability for the Coast Guard, define terms, and require a plan for a reimbursement program.