Not necessarily. The statute contains exceptions for certain involuntary membership, membership before age 16, membership by operation of law, and membership necessary to obtain employment, food rations, or other essentials of living. A separate exception addresses qualifying past membership that ended sufficiently long ago, subject to additional requirements. Joining for employment or career advancement does not automatically establish an exception; the specific facts must be evaluated. If no exception applies, an eligible applicant may seek a discretionary waiver.