Any action taken by any member of the Police Department, outside the territorial limits of the municipality, if taken in pursuance of any police matter involving the municipality, or if taken in the line of cooperation upon official police business with any of the other governmental units of Hamilton County, Ohio, or if taken under the authority of a Mutual Assistance Agreement, which action is ordered or approved by the Chief of Police of the municipality, or other supervisory officer, or if done upon an emergency basis, is subsequently ratified by the Chief of Police, shall be considered to be an action performed in the course of his employment by the member of the Police Department.
('67 Code, § 32.06)