Any member of the police force, fire department or band placed on the retired list, except those who have served on the force for twenty years or more and have retired for that reason, shall report for duty to the head of the police force, fire department or band, respectively, from time to time as may be ordered by the board of trustees or may be provided for in the bylaws of the board and shall be subject to the orders and discipline of the head of the police force, fire department, or band, respectively, and shall perform such duties as may be required of the member and for which, in the opinion of the medical board, the member may be fit, and for which the member shall be allowed full pay. For any refusal to obey these orders and for a breach of discipline, the head of the police force, fire department or band, as the case may be, shall report the member at once to the civil service commission in any county having a civil service commission, otherwise to the county council for such action as it may be deemed proper for the good of the service. The member shall be subject to punishment and dismissal in the same manner as those in active service. Any pension the retired member may have received shall cease in case of the retired member’s expulsion, and the pension for any refusal to obey orders and all other breaches of discipline as aforesaid shall be subject to whatever orders may be deemed proper by the civil service commission, or the county council as the case may be. The medical board shall make all examinations of the members of the police force, fire department, or band of the county whenever requested by the board of trustees or whenever requested by any member, for the purpose of certifying to the member’s physical or mental condition to the board of trustees.