The state of New Jersey passed the New Jersey Uniform Construction Code Act on October 7, 1975. The Act became effective on February 3, 1976. All construction codes and their enforcement were controlled by the provisions stated in the act. Uniform Construction Code Regulations (NJAC 5:23-1 et seq.) went into effect on January 1, 1977. The New Jersey Uniform Construction Code is divided into subcodes (model codes and standards) that are adopted individually by the Commissioner of Community Affairs. The energy subcode contains the energy provisions.
On February 20, 2007, New Jersey adopted the 2006 IECC with amendments. As the new commercial code, ASHRAE/IESNA 90.1-2004 was adopted with minor amendments. For both residential and commercial code compliance, either the previous code or the new code can be used during a six month interim period.
On September 7, 2010, a New Jersey Department of Community Affairs final rule adopting new state building codes was published in the New Jersey Register (42 N.J.R. 2043a) and became effective. This was nearly one year to the day after DCA initially proposed the rule (41 NJR 3140a) in September 2009.
The energy subcode of the New Jersey Uniform Construction Code (NJAC 5.23-3) has been amended to incorporate the 2009 IECC and ASHRAE Standard 90.1-2007 (in lieu of Chapter 5 of the IECC). There will be a six-month transition period during which builders may use the new construction codes edition or the previous one. The implementation of duct testing requirements will be delayed until January 2013.
This rule had been set to become effective on February 1, 2010, but on January 20, newly-inaugurated Gov. Chris Christie signed Executive Order 1, freezing the implementation of all proposed rules for 90 days pending review by the new administration. Further delays stalled the update from the previous state energy code based on the 2006 IECC and Standard 90.1-2004.