39 CFR 776.8: Scope.

(a) The regulations in this subpart are applicable to the following proposed postal facility actions located in a wetland:

(1) New construction, owned or leased; or

(2) Construction projects at an existing facility that would alter the external configuration of the facility.

(b) These procedures are not applicable to the following postal facility actions:

(1) Construction of foot and bike trails, or boardwalks, including signs, the primary purposes of which are public education, interpretation, or enjoyment of wetland resources;

(2) Construction at existing postal facilities pursuant to the Architectural Barriers Act or postal accessibility standards;

(3) Any facility construction project deemed necessary to comply with federal, state, or local health, sanitary, or safety code standards to ensure safe working conditions;

(4) Construction of facilities that are functionally dependent on water, such as piers, docks, or boat ramps; or

(5) Maintenance, repair, or renovation of existing facilities.