The Secretary, in consultation with the Administrator of the Environmental Protection Agency, shall, within 18 months after November 5, 1990, review the inland coastal zone boundary of each coastal State program which has been approved or is proposed for approval under section 306 of the Coastal Zone Management Act of 1972 [
16 U.S.C.
1455], and evaluate whether the State’s coastal zone boundary extends inland to the extent necessary to control the land and water uses that have a significant impact on coastal waters of the State.