“ Upon recommendation by the employing agency, and subject to qualifications and other requirements prescribed by the Office of Personnel Management, an employee in a position in the excepted service under 5 C.F.R. 213.3102 (11) as a reader, interpreter, or personal assistant for a handicapped employee, whose employment in such position is no longer necessary and who has completed at least 1 year of satisfactory service in such position under a non-temporary appointment, may be converted noncompetitively to a career or career-conditional appointment. ”