The Authority may conduct its operations in any or all of the counties of the State. If an existing housing authority is operating in a county where the South Carolina State Housing Finance and Development Authority determines that a need exists for additional housing for low-income families, the South Carolina State Housing Finance and Development Authority shall advise that housing authority of its findings of need for that county and shall urge that housing authority to make appropriate plans to meet that need. If, within sixty days after a housing authority has received such notification of need, that housing authority has not submitted an acceptable plan of action for meeting that need, the South Carolina State Housing Finance and Development Authority may construct and operate housing for low-income families in such county; provided, however, that before any such operation by the South Carolina Housing Finance and Development Authority occurs, the South Carolina State Housing Finance and Development Authority shall first obtain the written approval of the governing body of the county, if such proposed operation is intended for an unincorporated area of the county or, if the proposed operation is intended to take place within the jurisdiction of an incorporated municipality, then in such instance the South Carolina State Housing Finance and Development Authority shall obtain the written approval of the governing body of such municipality and shall then have authority over the same jurisdiction as that municipality had.