SJC upholds MBTA Communities Act, but guidelines currently unenforceable

From the decision:

Conclusion. For the foregoing reasons, we declare that the
act creates an affirmative duty for each MBTA community to have
a zoning bylaw that allows for at least one district of
reasonable size where multifamily housing is permitted as of
right, as dictated by G. L. c. 40A, § 3A, and that the act’s
delegation of authority to HLC to promulgate guidelines does not
violate art. 30 of the Massachusetts Declaration of Rights. We
further declare that the Attorney General has the power to bring
suit for declaratory and injunctive relief to enforce § 3A and
its corresponding guidelines. However, because HLC’s current
guidelines were not promulgated in accordance with the APA, we
declare them ineffective and, as such, presently unenforceable.