Section 27. Local laws and resolutions increasing or decreasing salaries or allowances

No local law or resolution  increasing  or  decreasing  the  salaries,  or  other  allowances,  in accordance with section twenty-six
  shall be adopted during the period between the general election day  and
  the  thirty-first day of December, both such days inclusive, in any year
  in which all of the council members are elected.