(1) those ex-service personnel who have served on active duty in any branch of the armed forces of the United States and have been separated therefrom under honorable conditions and who have established the present existence of a service-connected disability or who are receiving compensation, or disability retirement benefits by reason of public laws administered by the veterans administration, or the department of defense;

(2) the spouses of such service-connected disabled ex-servicemen or women as have themselves been unable to qualify for any civil service appointment by reason of their disability;

(3) the unmarried widows or widowers of deceased ex-service personnel who served on active duty in any branch of the armed forces of the United States during any war, or in any campaign or expedition (for which a campaign badge has been authorized), or during the period specified in subdivision (5) of this section and who were separated therefrom under honorable conditions; and

(4) those ex-service personnel who have served on active duty in any branch of the armed forces of the United States, during any war, or in any campaign or expedition (for which a campaign badge has been authorized), and have been separated therefrom under honorable conditions; and

(5) those ex-service personnel who have served on active duty in any branch of the armed forces of the United States during the period beginning July 1, 1955, and have been separated from the armed forces under honorable conditions. (Amended 1967, No. 268 (Adj. Sess.), § 1, eff. March 7, 1968; 1987, No. 174 (Adj. Sess.), § 6.)