No mission, function, or asset (including for purposes of this subsection any ship, aircraft, or helicopter) of the Coast Guard may be diverted to the principal and continuing use of any other organization, unit, or entity of the Department, except for details or assignments that do not reduce the Coast Guard’s capability to perform its missions.
The Secretary may not substantially or significantly reduce the missions of the Coast Guard or the Coast Guard’s capability to perform those missions, except as specified in subsequent Acts.
The Secretary may waive the restrictions under paragraph (1) for a period of not to exceed 90 days upon a declaration and certification by the Secretary to Congress that a clear, compelling, and immediate need exists for such a waiver. A certification under this paragraph shall include a detailed justification for the declaration and certification, including the reasons and specific information that demonstrate that the Nation and the Coast Guard cannot respond effectively if the restrictions under paragraph (1) are not waived.
None of the conditions and restrictions in this section shall apply when the Coast Guard operates as a service in the Navy under section 3  of title 14.