5 U.S.C. § 6312

(a) Credit shall be given in determining years of service for the purpose of section 6303(a) for— (1) service as an employee of a county committee established pursuant to section 8(b) of the Soil Conservation and Allotment Act or of a committee or an association of producers described in section 10(b) of the Agricultural Adjustment Act; and (2) service under a nonappropriated fund instrumentality of the Department of Defense or the Coast Guard described in section 2105(c) by an employee who has moved without a break in service of more than 3 days to a position subject to this subchapter in the Department of Defense or the Coast Guard, respectively. (b) The provisions of subsections (a) and (b) of section 6308 for transfer of leave between leave systems shall apply to the leave systems established for such county office employees and employees of such Department of Defense and Coast Guard nonappropriated fund instrumentalities, respectively.