This part applies to employment of civilian annuitants who would be subject to termination of annuity or annuity offset under 5 U.S.C. 8344 or 5 U.S.C. 8468. Agencies may request exceptions as provided in subpart B of this part from the reemployed annuitant provisions of 5 U.S.C. 8344 (for Civil Service Retirement System annuitants) or 8468 (for Federal Employees' Retirement System annuitants), as appropriate.