Amends the Coastal Zone Management Act of 1972 to require Federal agencies conducting natural resources activities in a coastal zone to conduct such activities in a manner consistent with the mandatory policies of approved State management programs, unless the Federal activity is: (1) undertaken to counter the effects of a declared national emergency; (2) undertaken for reasons of national security; (3) required by Federal law which prevents consistency with such a coastal zone management program; or (4) undertaken pursuant to the Magnuson Fishery Conservation and Management Act.