In addition to any and all salaries and other allowances set forth in Section 45-35A-54.05, at the expiration of the respective terms of office of the mayor and each associate commissioner, each successor in office thereto shall be entitled to receive an expense allowance of one hundred dollars ($100) per month, payable from the city treasurer in the same manner as salaries and expense allowances are provided for in Section 45-35A-54.05.