Section 339.306 - Processing medical eligibility determinations(a) In accordance with the provisions of this part, agencies are authorized to medically disqualify a nonpreference eligible. A nonpreference eligible so disqualified has a right to a higher level review of the determination within the agency.(b) OPM must approve the sufficiency of the agency's reasons to:(1) Medically disqualify or pass over a preference eligible in order to select a nonpreference eligible for:(i) A competitive service position under part 332 of this chapter; or(ii) An excepted service position in the executive branch subject to title 5, U.S. Code;(2) Medically disqualify or pass over a 30 percent or more compensably disabled veteran for a position in the U.S. Postal Service in favor of a nonpreference eligible;(3) Medically disqualify a 30 percent or more compensably disabled veteran for assignment to another position in a reduction in force under § 351.702(d) of this chapter; or(4) Medically disqualify a 30 percent or more disabled veteran for noncompetitive appointment, for example, under § 316.302(b)(4) of this chapter.