Section 15-10-105 - Joint exercise of powers; increasing area of operation(a) Any powers capable of exercise by a municipality or county under this chapter may be exercised jointly with any other municipality or county or combinations thereof. (b) The area of operation of any municipality, county or housing authority or any combination of these bodies operating jointly may be increased to include additional contiguous areas upon the request or consent, by resolution, of the governing body of the municipality or county within which the additional area lies.