The State Council of Civil Defense in providing for the mobilization and coordination of municipal and volunteer agencies shall have power to make the personnel and equipment of such agencies available for duty and use in any political subdivision other than the political subdivision in which such personnel and equipment are normally used, employed or act. Unless existing or future voluntary agreements between political subdivisions require otherwise, the use of personnel and equipment of any municipal agencies in any political subdivision other than the political subdivision in which they normally are used, employed or act shall be without charge or expense to such political subdivision. Whenever any part of the regular personnel of any municipal agency of any political subdivision are engaged under the provisions of this act in rendering services in another political subdivision, such personnel shall have the same powers, duties, rights, privileges and immunities as if they were performing their duties in the political subdivision in which they are normally employed or act.