; or (3) to cause or attempt to cause an employer to discriminate against an individual in violation of this section. (e) Training programs It shall be an unlawful employment practice for any employer, labor organization, or joint labor-management committee controlling apprenticeship or other training or retraining, including on-the-job training programs, to discriminate against any individual because of the individual's military service in admission to, or employment in, any program established to provide apprenticeship or other training. (f) Businesses or enterprises with personnel qualified on basis of military service Notwithstanding any other provision of this section, it shall not be an unlawful employment practice for an employer to hire and employ employees, for an employment agency to classify, or refer for employment any individual, for a labor organization to classify its membership or to classify or refer for employment any individual, or for an employer, labor organization, or joint labor-management committee controlling apprenticeship or other training or retraining programs to admit or employ any individual in any such program, on the basis of the individual's military service in those certain instances where military service is a bona fide occupational qualification reasonably necessary to the normal operation of that particular business or enterprise. (g) National security Notwithstanding any other provision of this section, it shall not be an unlawful employment practice for an employer to fail or refuse to hire and employ any individual for any position, for an employer to discharge any individual from any position, or for an employment agency to fail or refuse to refer any individual for employment in any position, or for a labor organization to fail or refuse to refer any individual for employment in any position, if— (1) the occupancy of such position, or access to the premises in or upon which any part of the duties of such position is performed or is to be performed, is subject to any