Employee has the meaning given that term in 5 U.S.C. 2105, except that for the purpose of applying the provisions regarding equivalent increases and creditable service with respect to non-GS service, employee also includes -
(1) An individual employed by the U.S. Postal Service or the Postal Rate Commission who would be considered an employee under 5 U.S.C. 2105 but for the exclusion in section 2105(e); and
(2) An individual employed by a nonappropriated fund instrumentality for service that is creditable under § 531.406(b)(4).