At Town Meeting, Ipswich residents voted to maintain the Stretch Code but not adopt the Specialized Stretch Code.
Ipswich adopted the Stretch Code in 2018. A majority of Massachusetts municipalities utilize the Stretch Code. The Specialized code is a newer "net zero" version. In the North Shore region, Salem and Swampscott have adopted the Specialized Stretch code but it doesn’t go into effect until July 1.
You can read more about the different levels of building energy code here.