If any member of the fire department and/or police department shall become or be found to be totally disabled for the discharge of his duties as a member of said fire department and/or police department, mentally or physically, by reason of sickness or injury caused or sustained by reason of service or discharge of his duty in said department, after such city shall have come within the terms of this article, said board of disability and relief shall order the payment and there shall be paid from said fund to said fireman and/or policeman each month thereafter an amount equal to fifty percent (50%) of said fireman’s and/or policeman’s monthly salary. Such amount shall be paid throughout such total disability for service.

If any member of the fire department and/or police department shall become or be found to be permanently and totally disabled for the discharge of his duties as a member of said fire department and/or police department, mentally or physically, by reason of sickness or injury, and said member shall have had not less than five (5) years’ service with such department, there shall be paid to said fireman and/or policeman from said fund, for each year’s active service, not to exceed a period of twenty (20) years, one-fortieth (¼) of the monthly salary of such fireman and/or policeman at the time such disability is incurred. Such amount shall be paid throughout such permanent and total disability.

In passing upon the question of disability, said board shall refer the matter to its medical board, or such other physician or physicians as it may deem proper, and said board may require like examinations from time to time throughout the period of disability claimed by said fireman and/or policeman.

If said city pays a salary to its fireman and/or policeman while disabled in an amount equal to the disability relief allowed hereunder, said fireman and/or policeman shall not be entitled to any disability relief hereunder.