Tying dogs outside (Anti-tethering)
Dogs can no longer be tied up alone outside for more than 15 minutes. However if there is an adult (19 years or older) outside with the dog, he can be tied up as long as the adult is with him. The dog also needs to be on a long enough tie-out that he can move freely (5 times his body length) and weighs just 1/8 of his bodyweight (no big tow chains).
If your dog is tethered it needs to be tethered in a manner to keep it 15 ft. from a public sidewalk. Even if your dog is in a fenced yard or outside kennel the tethering ordinance still applies. If you have a securely fenced yard or fenced run for your dog and it is not tethered, it is ok to leave him outdoors without human supervision for extended periods of time. Enforcement of this ordinance begins October 15, 2008.