The Mayor and each Councilman shall receive, as remuneration for his service to the city, the sum of five (5) dollars per meeting of the Council actually attended by him, but not to exceed in total one hundred thirty (130) dollars per year. The Mayor shall receive the sum of one hundred (100) dollars per year in addition to the remuneration received by him as a member of the Council. Such salaries shall be payable quarterly, and, except as otherwise provided in this charter, shall constitute the only salary or remuneration which may be paid for services performed by the Mayor or any Councilman for the discharge of any official duty for or on behalf of the city during their term of office, except services as supervisor and members of the Board of Review. Upon authorization of the Council, reasonable expenses may be allowed when actually incurred on behalf of the city.