administered by the Secretary of Commerce to carry out this section and ensure the conservation and enhancement of each coastal carbon area of significance. (g) Requirements for Federal actions With respect to any proposed agency action that has the potential to cause an adverse impact on the carbon storage, ecosystem services, or habitat capacity of any coastal carbon area of significance, each Federal agency shall comply with the following requirements: (1) Notification Such Federal agency shall notify the Administrator of such proposed agency action. (2) Determination of adverse impact The Administrator, in consultation with the proposing agency and subject to public comment, shall determine whether the proposed agency action will cause an adverse impact on the carbon storage, ecosystem, or habitat of a coastal carbon area of significance. (3) Alternative With respect to any proposed action the Administrator determines will have an adverse impact under paragraph (2), the proposing agency, in consultation with the Administrator, shall determine whether there is an alternative action that would prevent such adverse impact and fulfill the purpose of the proposed action. The proposing agency shall not take an action that would cause an adverse impact if an alternative that would not cause such adverse impact is available and would fulfill the purpose of such action. (4) Carbon storage offsets With respect to a proposed action for which the agency determines no alternative is available under paragraph (3), the proposing agency shall— (A) in consultation with the Administrator, take measures to minimize and mitigate such adverse impact