6 USC 316 - Preserving the Federal Emergency Management Agency

(a) Distinct entity 
The Agency shall be maintained as a distinct entity within the Department.
(b) Reorganization 
Section 452 of this title shall not apply to the Agency, including any function or organizational unit of the Agency.
(c) Prohibition on changes to missions 

(1) In general 
The Secretary may not substantially or significantly reduce the authorities, responsibilities, or functions of the Agency or the capability of the Agency to perform those missions, authorities, responsibilities, except as otherwise specifically provided in an Act enacted after October 4, 2006.
(2) Certain transfers prohibited 
No asset, function, or mission of the Agency 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 capability of the Agency to perform its missions.
(d) Reprogramming and transfer of funds 
In reprogramming or transferring funds, the Secretary shall comply with any applicable provisions of any Act making appropriations for the Department for fiscal year 2007, or any succeeding fiscal year, relating to the reprogramming or transfer of funds.