Utah Code § 10-20-605

(1) A municipality may adopt an ordinance: (a) designating sending zones and receiving zones located wholly within the municipality; (b) designating a sending zone if the area described in the sending zone is located, at least in part, within the municipality, and the area described in the sending zone that is located outside the municipality complies with Subsection (2); (c) designating a receiving zone if the area described in the receiving zone is located, at least in part, within the municipality, and the area described in the receiving zone that is located outside the municipality complies with Subsection (2); and (d) allowing the transfer of a transferable development right from a sending zone to a receiving zone. (2) A municipality may adopt an ordinance designating a sending zone or receiving zone that is located, in part, in another municipality or unincorporated county if the legislative body of every municipality or county with land inside the sending zone or receiving zone adopts an ordinance designating the sending zone or receiving zone. (3) A municipality may not allow the use of a transferable development right unless the municipality adopts an ordinance described in Subsection (1).