Training in a non-pay status for Individual Ready Reservists and active status Standby Reservists. Participation in voluntary training is for retirement points only and may be achieved by training with Selected Reserve or voluntary training units; by active duty for training; by completion of authorized military correspondence courses; by attendance at designated courses of instruction; by performing equivalent duty; by participation in special military and professional events designated by the Military Departments; or by participation in authorized Civil Defense activities. Retirees may voluntarily train with organizations to which they are properly preassigned by orders for recall to active duty in a national emergency or declaration of war. Such training shall be limited to that training made available within the resources authorized by the Secretary concerned.