Utah Code Ann. 39-5-3
Liability: Providing Shelter
An individual who owns property and who, without compensation, allows others to use the individual’s property for shelter during training or during an actual attack will not be held legally responsible for injury, death, or damage to property that might result from use of the property.
Owner of property free from liability for injuries to persons or property during actual, impending, or mock attack
Any person owning or controlling real estate or other premises who voluntarily and without compensation grants a license or privilege, or otherwise permits the designation or use of the whole or any part or parts of such real estate or premises for the purpose of sheltering persons during an actual, impending, mock or practice attack, shall, together with his successors in interest, if any, not be civilly liable for negligently causing the death of, or injury to, any person on or about such real estate or premises or for loss of, or damage to, the property of such person.