Chapter 4.03.007 of the Code of Ordinances: Tethering Prohibited
It is unlawful for an owner or keeper to restrain a dog by means of a tether. A tether is defined as a chain, rope, cable, leash, or other similar device used to attach an animal to a stationary object or trolley system. The only time a dog may be tethered is if the owner is physically present outside with the dog, or it’s being restrained for veterinary treatment, grooming, training, or law enforcement activity.

Dogs are still required to be on a leash when not confined to the property by a fence.