employment
(g) The term “employment” means service performed as an employee. For the purposes of determining eligibility for and the amount of benefits and the amount of contributions due pursuant to this chapter, employment after June 30, 1940 , in the service of a local lodge or division of a railway-labor-organization employer or as an employee representative shall be disregarded. For purposes of determining eligibility for and the amount of benefits and the amount of contributions due pursuant to this chapter, employment as a delegate to a national or international convention of a railway labor organization defined as an “employer”, in subsection (a) of this section, shall be disregarded if the individual having such employment has not previously rendered service, other than as such a delegate, which may be included in his “years of service” for purposes of the Railroad Retirement Act [ 45 U.S.C. 231 et seq.].