US HB556

Prohibits the Secretary of the Interior (through U.S. Fish and Wildlife Service and Bureau of Land Management) and Secretary of Agriculture (through Forest Service) from banning lead ammunition or fishing tackle on federal lands and waters open to hunting or fishing

Prohibits these agencies from issuing regulations on lead content levels in ammunition or tackle used on applicable federal lands and waters

Preserves existing migratory bird hunting regulations under 50 CFR sections 20.21 and 20.108, which restrict lead shot for waterfowl hunting

Allows exceptions for specific federal land units where the Secretary can demonstrate wildlife population decline is primarily caused by lead ammunition or tackle based on field data from that specific location

Any site-specific lead restriction must be consistent with state law, state fish and wildlife department policy, or approved by the state fish and wildlife department, and requires Federal Register notice explaining justification