The Common Council shall have the power to designate and authorize
any officer or employee paid from City funds, except members, officers
and employees of the legislative branch, to attend an official or
unofficial convention, conference or school for the betterment of
City government. Within the appropriations therefor and when so authorized,
all necessary and actual expenses, including but not limited to a
registration fee and mileage as fixed by the Common Council, shall
be paid from City funds.