The common council may levy a tax for general governmental purposes
and for the payment of principal and interest of the bonded municipal
debt and for the amount of other indebtedness of the city lawfully
contracted.
Every appropriation, except an appropriation for a capital expenditure,
shall lapse at the close of the fiscal year to the extent that it
has not been expended or encumbered. An appropriation for a capital
expenditure shall continue in force until the purpose for which it
was made has been accomplished or abandoned; the purpose of any such
appropriation shall be deemed abandoned if five years pass without
any disbursement from or encumbrance of the appropriation.