Whenever the building and facilities of a county home are suitable for use as a hospital, the board of county commissioners may designate said county home a county hospital. Thereafter, Chapter 339 of the Revised Code shall govern the operation of such facility, provided, that the members of the board of county commissioners or their designees shall serve ex officio as members of the board of trustees. The appointment of the board of trustees provided in section 339.02 of the Revised Code shall be made within thirty days after the board of county commissioners designates the facility a county hospital. All funds appropriated to the county home, and the proceeds of all tax levies and bond issues for the use and benefit of the county home, may be expended for the county hospital. Whenever additional tax levies or bond issues are not required for the purchase, appropriation, construction, enlargement, improvement, or rebuilding of a county hospital at the time the board of county commissioners designates the facility a county hospital, the tax levy or bond issue required by sections 339.01 and 339.02 of the Revised Code may be dispensed with.