April 27, 2023:- Landlords in Massachusetts have been preparing to adapt to the new State Sanitary Code, which was supposed to go into effect this month. But today the Department of Public Health announced that the promulgation of the amendments to the Housing Code, 105 CMR 410.000, Minimum Standards of Fitness for Human Habitation (State Sanitary Code, Chapter II), has been delayed. The email did not give a reason.
For the time being, therefore, the old Sanitary Code remains in effect.

Photo by Levi Meir Clancy on Unsplash
UPDATE
Today (April 28, 2023) the Department stated that it expects to publish the new code on May 12, 2023, which will be the day it goes into effect.