Utah Code § 54-23-104

Unless the railroad notifies the fiber optic carrier in writing or electronically that the approved crossing is a serious threat to the safe operation of the railroad or to the current or future use of the railroad right-of-way, would violate any federal law or regulation applicable to a public transit district, or would violate an agreement between a public transit district and the federal government, the railroad shall issue the permit or crossing agreement and schedule flagging to occur within 45 calendar days of the approved application.