Here is the NJ state regulation concerning management of beeyards:
TITLE 2. DEPARTMENT OF AGRICULTURE
CHAPTER 76. STATE AGRICULTURE DEVELOPMENT COMMITTEE
SUBCHAPTER 2A. AGRICULTURAL MANAGEMENT PRACTICES: GENERALLY ACCEPTED OPERATIONS AND PRACTICES
N.J.A.C. 2:76-2A.2 (2005)
§ 2:76-2A.2 Apiary agricultural management practice
(a) The following words and terms, as used in this section, shall have the following meanings:
"Apiary" means one or more colonies of honey bees.
"Bee" means members of the genus apis.
"Colony" means a hive or swarm of bees.
"Hive" means the manmade structure which contains a colony of honey bees.
(b) All overwintering apiaries must be registered with the New Jersey Department of Agriculture, pursuant to N.J.A.C. 2:24-3.1 et seq.
(c) Overwintering apiaries, honey production apiaries, queen and package apiaries and bee colonies utilized for crop pollination will not exceed an average density of 50 colonies per acre.
(d) All colonies must be located at least 25 feet from a public sidewalk, alley, street or road.
(e) All apiaries must be at least 300 feet from any residence, excluding the residence(s) associated with the agricultural operation. If less than 300 feet from any residence, a six feet high solid fence or hedge must be erected buffering the residence.
(f) All apiaries must have on site an adequate source of water which is no more than one-half mile from the apiary.
(g) All bee equipment and hives must be maintained in good condition.
(h) All colonies must be kept in movable frame hives in accordance with N.J.S.A. 4:6-10.
But you may have local ordinances that have the effect of resticting beekeeping, either specifically or by restricting agricultural activities in certain areas. Here's another regulation you might be interested in:
TITLE 2. DEPARTMENT OF AGRICULTURE
CHAPTER 24. DISEASES OF BEES
SUBCHAPTER 3. REGISTRATION OF APIARIES
N.J.A.C. 2:24-3.1 (2005)
§ 2:24-3.1. Registration requirements; confidentiality and documentation
(a) All bee yards in New Jersey where bees are over-wintered must be registered annually with the New Jersey Department of Agriculture.
(b) The only information contained in the individual registration that shall be considered public shall be the beekeeper's name and mailing address; all other required information shall be considered confidential.
(c) The Department of Agriculture shall supply the registrant, with any and all appropriate orders, laws and rules.
(d) Upon request, the Department shall issue to each registered beekeeper, documentation, which identifies them as a legally registered New Jersey beekeeper.
-- Kris