(3)A Reserve Police Officer employed on active duty under sub-section (1), or when a member or body of Reserve Police Officers are so employed, the officer in charge of such member or body shall be responsible for the efficient performance of that duty and all police officers who but for the employment of one or more reserve police officers or body of reserve police officers would be responsible for the performance of that duty will, to the best of their ability, assist and co-operate with the said reserve police officer or officers in charge of a member or body of reserve police officers.