(a) form, join, assist and participate in, or to refrain from forming, joining, assisting or participating in any labor organization of their choosing;
(b) be represented by labor organizations and to engage in collective bargaining with the Government in the determination of the wages, hours, or other terms and conditions of employment and the administration of grievances arising thereunder;
(c) engage in lawful, concerted activities to enhance their collective bargaining position and promote their mutual well-being and protection, without interference, restraint, or coercion; and
(d) elect individually in writing, to have deducted from their payroll checks an amount for union dues, payment-in-lieu of dues, group insurance premiums, and other expenses of the services or benefits provided by the exclusive representative and incorporated in the collective bargaining agreement.