SECTION 6. EFFECT OF REFERENDUM ON EMERGENCY MEASURES.

   Emergency ordinances and resolutions shall go into effect at the time indicated therein, notwithstanding that a referendum may be filed against them.

   If, when submitted to a vote of the electors, an emergency measure be not approved by a majority of those voting thereon, it shall be considered repealed as of the date of the certification of the vote thereon, but such measure shall be deemed sufficient authority for payment, in accordance with the measure, of any expense incurred previous to the referendum vote thereon.