Utah Code § 10-20-801: Enactment of subdivision ordinance.

(1) The legislative body of a municipality may enact ordinances requiring that a subdivision plat comply with the provisions of the municipality's ordinances and this part before:

(a) the subdivision plat may be filed and recorded in the county recorder's office; and

(b) lots may be sold.

(2) If the legislative body fails to enact a subdivision ordinance, the municipality may regulate subdivisions only to the extent provided in this part.

(3) The joining of a lot or lots to a parcel does not constitute a subdivision as to the parcel or subject the parcel to the municipality's subdivision ordinance.

(4) A legislative body may adopt a land use regulation that specifies that combining lots does not require a subdivision plat amendment.