65.06(9)(9) Unless otherwise specifically provided by law, no municipal bonds other than those provided for in the budget shall be issued during the ensuing fiscal year, except in case of great emergency when necessary to protect the public health or safety, and then only when authorized by the common council by a three-fourths vote of all the alderpersons. 65.06(10)(10) The city may expend any money or incur liabilities for any purposes which by law are assessable as benefits against parcels of land or are a legal charge against such parcels of land. 65.06(11)(11) Every officer or employee who shall violate or participate in the violation of the provisions of this chapter shall be personally liable to the city for all loss or damage to the city occasioned thereby. 65.06(12)(12) The adoption of the budget shall be authority for the expenditure by a department for the purposes therein provided and of the amounts assigned to the department thereby and no further action by the common council shall be necessary to authorize any department to make such expenditures, except that as provided herein it shall not authorize the expenditure of any money from the contingent fund of the common council. 65.06(13)(13) The common council may at any time suspend the expenditure of any fund assigned to any department by the budget which has not been expended or reserved for the payment of indebtedness incurred by the department. Such action by the council shall be by a majority vote of all the alderpersons but shall not apply to the funds of a department which determines its own tax levy and whose funds are not subject to the control of the common council. 65.06(14)(14) The adoption of the budget for any budget period shall not authorize the expenditure of any funds for the succeeding budget period except for indebtedness incurred during the budget year. 65.06(15)(15) All funds subject to the control of the common council assigned by the budget to a department not expended during the budget period and not reserved for indebtedness incurred during the budget period shall revert to the general revenues of the city. 65.06(16)(16) All funds of a department not subject to the control of the common council and not expended or reserved for indebtedness shall become a part of the general revenues of such department. 65.06(17)(17) Subsections (13), (14), (15) and (16) do not apply to the expenditure of funds, the proceeds of bonds or mortgage certificates, nor the surplus revenues of any water system, lighting system or municipally owned utility. In establishing the budget format with respect to funds and accounts related to proprietary operations, the common council may authorize accounting procedures which follow the uniform system of accounts authorized by the public service commission in the case of municipal utilities or accepted commercial accounting practices in other instances. 65.06(18)(18) The omission from the budget of any of the following items shall not prevent the placing of the same on the tax roll for the levy and collection of the tax and the payment of the money therefor: 65.06(18)(a)(a) The payment of interest on or the principal of any bonded debt of the city when due; 65.06(18)(b)(b) The payment of principal and interest on mortgages or mortgage certificates when due; and 65.06(18)(c)(c) Funds required to be raised by any mandatory provision of law. 65.0765.07 Power of council to levy taxes. 65.07(1)(1) The common council shall have power to levy annually a tax upon all the taxable property in the city for the following purposes: 65.07(1)(a)(a) A sufficient general city fund to pay the expenses of city departments, boards and commissions which are subject to the control of the common council. The rate of taxation for the purposes enumerated in this paragraph shall be established only by affirmative vote of at least two-thirds of all members elected to the common council. 65.07(1)(b)(b) A fund to pay the city’s contribution to the fire fighters’ and police officers’ pension fund and for any similar fund which may be created by law. 65.07(1)(c)(c) A sufficient permanent improvement fund for any purpose authorized by s. 66.0913 (1), 67.04 or 67.12 for which money may be borrowed or bonds issued, and for the initial furniture, fixtures, machinery and equipment required in such new facilities permitted thereunder. 65.07(1)(d)(d) A sufficient sewerage fund to maintain and operate any sewerage disposal plant. 65.07(1)(f)(f) A school construction fund, as constituted and for the purposes specified in s. 119.48, not exceeding 0.6 mills on each dollar of the assessed valuation of all taxable property in the city. 65.07(1)(g)(g) A school extension fund, as constituted and for the purposes specified in s. 119.47. 65.07(1)(j)(j) A sufficient fund to pay the interest and principal on the funded debt falling due within the year. 65.07(1)(L)(L) A sufficient common council contingent fund.