§ 6. Appointments and promotions in the civil service of the state and all of the civil divisions thereof, including cities and villages, shall be made according to merit and fitness to be ascertained, as far as practicable, by examination which, as far as practicable, shall be competitive; provided, however, that any member of the armed forces of the United States who served therein in time of war, and who, at the time of such member's appointment or promotion, is a citizen or an alien lawfully admitted for permanent residence in the United States and a resident of this state and is honorably discharged or released under honorable circumstances from such service, shall be entitled to receive five points additional credit in a competitive examination for original appointment and two and one-half points additional credit in an examination for promotion or, if such member was disabled in the actual performance of duty in any war, is receiving disability payments therefor from the United States veterans administration, and his or her disability is certified by such administration to be in existence at the time of application for appointment or promotion, he or she shall be entitled to receive ten points additional credit in a competitive examination for original appointment and five points additional credit in an examination for promotion. Such additional credit shall be added to the final earned rating of such member after he or she has qualified in an examination and shall be granted only at the time of establishment of an eligible list. No such member shall receive the additional credit granted by this section after he or she has received one appointment, either original entrance or promotion, from an eligible list on which he or she was allowed the additional credit granted by this section.