“ In 1953, the Alabama Legislature enacted a statute, Ala.Laws 1953, No. 720 p. 974, which provides that any public employee who joins or participates in a 'labor union or labor organization' forfeits the 'rights, benefits, or privileges which he enjoys as a result of his public employment.' Section 1 defines a 'labor union or labor organization' to include an organization of employees whose purpose is to deal with employers concerning grievances, labor disputes, or conditions of employment. ”

“ One policy served by that practice is that of not passing on constitutional questions in situations where an authoritative interpretation of state law may avoid the constitutional issues. Spector Motor Co. ”