Amends the Coastal Zone Management Act of 1972 to require each Federal agency conducting or supporting an activity significantly affecting the natural resources or land or water uses in the coastal zone to conduct or support that activity in a manner which is fully consistent with the enforceable and mandatory policies of approved State management programs.
Exempts from such requirement any Federal activity that is: (1) undertaken to counter the immediate effects of a presidentially declared national emergency; (2) undertaken by the Secretary of Defense and necessary for reasons of national security; (3) required by any provision of a Federal law which prevents consistency with any provision of an approved State coastal zone management program; or (4) undertaken pursuant to a specified Federal law. Allows Federal agencies to deviate from full consistency in such circumstances only to the extent justified by the presence of such circumstance.