To give effect to more accurate maps of units of the John H. Chafee Coastal Barrier Resources System that were produced by digital mapping of such units, and for other purposes.

Cape San Blas P30/P30P (1 of 2)— The map entitled “Cape San Blas Unit P30/P30P (1 of 2)” and dated January 11, 2016, as included in the set of maps entitled “Coastal Barrier Resources System” referred to in section 4(a) of the Coastal Barrier Resources Act (16 U.S.C. 3503(a)), is hereby replaced by another map relating to that unit entitled “Cape San Blas Unit P30/P30P (1 of 2)” and dated December 19, 2018.

Cape San Blas P30/P30P (2 of 2)— The map entitled “Cape San Blas Unit P30/P30P (2 of 2)” and dated January 11, 2016, as included in the set of maps entitled “Coastal Barrier Resources System” referred to in section 4(a) of the Coastal Barrier Resources Act (16 U.S.C. 3503(a)), is hereby replaced by another map relating to that unit entitled “Cape San Blas Unit P30/P30P (2 of 2)” and dated December 19, 2018.