1. The city counselor of the said cities shall be the legal adviser of the board of trustees.

2. The board of trustees shall designate a medical board to be composed of three physicians who shall arrange for and pass upon all medical examinations required under the provisions of sections 86.010 to 86.193, shall investigate all essential statements and certificates made by or on behalf of a member in connection with an application for disability retirement and shall report in writing to the board of trustees its conclusions and recommendations upon all the matters referred to it.