The governing authorities of the city, any applicant for benefits of the disability and relief fund for firemen and policemen, or any two active members of said fire department or any two active members of said police department, being aggrieved at the decision or order of said board of disability and relief of said city, may file with said board of disability and relief, and with said board of disability and relief appeals duplicate copies of a petition for the rehearing of the matter in which said decision or order was made. Within thirty days thereafter said board of disability and relief of said city shall file with said appeal board, true copies of all papers and documents which were before it, all evidence of record before it and a statement of all evidence heard by it and not of record, all certified to be true and correct, whereupon said appeal board shall fix a time for hearing and shall give said disability and relief board of said city, and the petitioner or petitioners for appeal notice of said time for hearing. When the matter shall come on for hearing said appeal board shall have before it all papers, statements, matters and things certified to it by said disability and relief board, as well as such additional evidence and documents as it may hear and receive and upon all of the same shall hear, consider and decide said matter fully and finally according to this article, and the facts. Said appeal board may cause witnesses to be sworn by one of its members, or by any other authority competent to administer oaths. Said appeal board may meet for all purposes at any time in the State of Mississippi when all are present, or upon the call of two members thereof. Said appeal board shall certify its decision to the disability and relief board and the governing authorities of said city, and such decision or order shall be final and binding and the said fund shall be disbursed according thereto. Any suit or other action affecting said fund shall be disbursed according thereto. Any suit or other action affecting said fund shall be by or against said city as custodian of said fund and not against said board.