Any member of a visiting force who is sent to Saint Lucia for the performance of police duties similar to duties performed by him or her in office shall, while on duty in Saint Lucia may be liable to perform the same duties and be subject to the orders of the Commissioner of Police in the same manner and in all respects as if he or she were a member of the police force, and shall, subject to this Act, have the same rights, powers, privileges and immunities as are conferred by law and custom on members of the police force as may be necessary for the performance of such duties.