The municipality hereby provides that the Police Department shall be and is hereby designated as a participating member and agency of a mutual aid law enforcement task force to cooperate in accordance with Tex. Local Gov't Code § 362.002 with the County Sheriff's Department. Members of the Police Department shall have only such additional investigative authority in the corporate limits of such member cities and the county as shall be from time to time prescribed by the Mayor or Chief of Police of such cities and the County Judge or Sheriff.