Land for the proposed Civic Center might be acquired through any one of several agencies. The city of Chicago, if financially able, could purchase the necessary area, or condemn it and assess back part of the expense on real estate in the vicinity. Any portion of the cost not raised by special assessment would have to be defrayed from the proceeds of bonds, which, under the constitution, must be redeemable within twenty years, and must not increase the indebtedness of the city beyond five per cent of the assessed value of property therein. Additional borrowing powers may be conferred upon the city through consolidation of various local authorities with the city under the so-called charter amendment to the state constitution, or through a change in the statutory method of fixing the assessed valuation of property. Appropriate legislation should be enacted at once in order to make land thus acquired available not only for city buildings or park purposes, but for the location of the buildings of other public bodies, upon financial and other terms to be fixed by negotiation with the city.[60] The county of Cook, though now lacking the necessary powers, might be authorized by the legislature to acquire, with the proceeds of a bond issue, the requisite area for the Civic Center, and to make appropriate arrangements for the location therein of federal and city buildings and other public edifices. The West Park board might well be asked to treat the Civic Center as a legitimate object for the exercise of its functions, and with that end in view it should be invested by the legislature with powers adequate to the immediate acquisition of the land embraced in the proposed Civic Center, and should be authorized to arrange appropriate terms for the future occupation of part of the area by the buildings of other governmental and public bodies; among which terms might be the reimbursement of part of the original cost. Among the agencies which might be created to carry out this and other features of the Plan should, perhaps, be mentioned a municipal corporation organized along the lines indicated by the forest-preserve legislation already alluded to. The Act of 1905[61] permitted cities and villages to be included in a forest-preserve district, and the city of Chicago was included within the boundaries of the proposed district the creation of which was submitted to popular vote. Section 6 of that act, providing for the designation of streets as pleasure driveways, specified that none of them should fall within any park district, and that no preserves should be within the limits of a park district. The legislature may have power to eliminate such restrictions, and to sanction the incorporation of a metropolitan board capable of exercising all the powers of a park commission within and without the city limits.