years of service for voluntary retirement. 20605. Applicability of other provisions of law relating to retirement. 20601. Officers: voluntary retirement for length of service (a) Twenty years or more The Secretary of the Air Force may, upon the officer’s request, retire a commissioned officer of the Space Force who has at least 20 years of service computed under section 20602 of this title, at least 10 years of which have been active service as a commissioned officer. (b) Thirty years or more A commissioned officer of the Space Force who has at least 30 years of service computed under section 20602 of this title may be retired upon the officer’s request, in the discretion of the President. (c) Forty years or more Except as provided in section 20503 of this title, a commissioned officer of the Space Force who has at least 40 years of service computed under section 20602 of this title shall be retired upon the officer’s request. 20602. Officers: computation of years of service for voluntary retirement (a) Years of active service For the purpose of determining whether an officer of the Space Force may be retired under section 20601 of this title, the officer’s years of service are computed by adding all active service in the armed forces. (b) Reference to section excluding service during certain periods Section 972(b) of this title excludes from computation of an officer’s years of service for purposes of this section any time identified with respect to that officer under that section. 20603. Enlisted members: voluntary retirement for length of service (a) Twenty to thirty years Under regulations to be prescribed by the Secretary of the Air Force, an enlisted member of the Space Force who has at least 20, but less than 30, years of service computed under section 20604 of this title may, upon the member’s request, be retired. (b) Thirty years or more An enlisted member of the Space Force who has at least 30 years of service computed under section 20604 of this title shall be retired upon the member’s request. 20604.