Council shall fix the salary and compensation of all officials and employees of the Village. The salary or compensation of all elective officials shall be fixed within thirty days after the adoption of this Charter and no subsequent change in the salary or compensation so fixed shall be effective within the term for which any official shall have been elected, unless such change is made at least three months prior to the commencement of the term, except that the salary or compensation may be increased at any time by the unanimous action of the Council.