; Public Law 106–79 ) is amended by striking September 30, 2017 and inserting September 30, 2018 . Funding prohibition 420. None of the funds made available by this or any other Act may be used to regulate the lead content of ammunition, ammunition components, or fishing tackle under the Toxic Substances Control Act ( 15 U.S.C. 2601 et seq.) or any other law. Contracting authorities 421. Section 412 of Division E of Public Law 112–74 is amended by striking fiscal year 2017 and inserting fiscal year 2019 . Chesapeake bay initiative 422. Section 502(c) of the Chesapeake Bay Initiative Act of 1998 ( Public Law 105–312 ; 16 U.S.C. 461 note) is amended by striking 2017 and inserting 2019 . Extension of grazing permits 423. The terms and conditions of section 325 of Public Law 108–108 (117 Stat. 1307), regarding grazing permits issued by the Forest Service on any lands not subject to administration under section 402 of the Federal Lands Policy and Management Act ( 43 U.S.C. 1752 ), shall remain in effect for fiscal year 2018. Funding prohibition 424. (a) None of the funds made available in this Act may be used to maintain or establish a computer network unless such network is designed to block access to pornography websites. (b) Nothing in subsection (a) shall limit the use of funds necessary for any Federal, State, tribal, or local law enforcement agency or any other entity carrying out criminal investigations, prosecution, or adjudication activities. Forest service facility realignment and enhancement act 425. Section 503(f) of the Forest Service Facility Realignment and Enhancement Act of 2005 ( 16 U.S.C. 580d note