Executive Order No. 180 establishes the rights of government employees to form and join employees' organizations to protect their interests. It prohibits discrimination against employees for membership in such organizations and interference by government authorities in the administration of these organizations. The rules implementing EO 180 specify that terms and conditions of employment, except those fixed by law, may be subject to negotiations between management and accredited employees' organizations. This includes concerns like leave policies, personnel development, communication systems, work assignments, and recreational activities. Salary increases specifically provided by law are not negotiable.