; and (ii) in existence before the expiration of the applicable 1-year period described in paragraph (1). . 105. Improve Federal agency compliance with Coastal Barrier Resources Act Section 7(a) of the Coastal Barrier Resources Act ( 16 U.S.C. 3506(a) ) is amended to read as follows: (a) Regulations Not later than 1 year after the date of the enactment of the Bolstering Ecosystems Against Coastal Harm Act , the head of each Federal agency affected by this Act shall revise or issue regulations and guidance as necessary to ensure compliance with the provisions of this Act. . 106. Authorization of appropriations Section 10 of the Coastal Barrier Resources Act ( 16 U.S.C. 3510 ) is amended by striking 2010 and inserting 2031 . II Changes to John H. Chafee Coastal Barrier Resources System Maps 201. Changes to John H. Chafee Coastal Barrier Resources System maps (a) Replacement maps described Each map included in the set of maps referred to in section 4(a)(1) of the Coastal Barrier Resources Act ( 16 U.S.C. 3503(a)(1) ), as amended by this section, that relates to a unit of the John H. Chafee Coastal Barrier Resources System established by section 4 of the Coastal Barrier Resources Act ( 16 U.S.C. 3503 ) referred to in this subsection is replaced in such set with the map described in the following list with respect to that unit and any other new or reclassified units depicted on that map panel: (1) The map entitled Salisbury Beach Unit MA–01P Plum Island Unit MA–02P (1 of 2) and dated December 18, 2020. (2) The map entitled Clark Pond Unit C00 Plum Island Unit MA–02P (2 of 2) Castle Neck Unit MA–03 Wingaersheek Unit C01 (1 of 2) and dated December 18, 2020. (3) The map entitled Wingaersheek Unit C01 (2 of 2) Good Harbor Beach/Milk Island Unit C01A Cape Hedge Beach Unit MA–48 Brace Cove Unit C01B and dated December 18, 2020. (4) The map entitled West Beach Unit MA–04 Phillips Beach Unit MA–06 and dated December 18, 2020. (5) The map entitled Snake Island Unit MA–08P, Squantum Unit MA–09P Merrymount Park Unit MA–10P West