((a)) ** .—** Nothing in sections 1601 through 1603 and 1606 through 1610 may be construed to impair the continued effectiveness of a collective bargaining agreement with respect to an agency or office that is a successor to an agency or office covered by the agreement before the succession.

((b)) ** .—** The Secretary of Defense shall notify Congress of any regulations prescribed to carry out this subchapter (other than sections 1605 and 1611). Such notice shall be provided by submitting a copy of the regulations to the congressional oversight committees not less than 60 days before such regulations take effect.