(a) Reorganization

The Secretary may allocate or reallocate functions among the officers of the Department, and may establish, consolidate, alter, or discontinue organizational units within the Department, but only—

(1) pursuant to section 542(b) of this title; or

(2) after the expiration of 60 days after providing notice of such action to the appropriate congressional committees, which shall include an explanation of the rationale for the action.

(b) Limitations

(1) In general

Authority under subsection (a)(1) does not extend to the abolition of any agency, entity, organizational unit, program, or function established or required to be maintained by this chapter.

(2) Abolitions

Authority under subsection (a)(2) does not extend to the abolition of any agency, entity, organizational unit, program, or function established or required to be maintained by statute.