H.R.5451: To reauthorize the Coastal Zone Management Act of 1972, and for other purposes.

Coastal Zone Reauthorization Act of 2008 - Amends the Coastal Zone Management Act of 1972 to authorize appropriations for grants under provisions relating to administration of a state's coastal zone management program, resource management improvement, coastal zone enhancement, and national estuarine reserves.

Authorizes the use of amounts in the Coastal Zone Management Fund for expenses incidental to the administration of the Act.

Increases, beginning in FY2009, the portion of amounts appropriated to carry out provisions relating to administration of a state's coastal zone management program and resource management improvement to be retained for use in implementing coastal zone enhancement grant provisions.