SECTION 1: Section 20 of chapter 40B of the Massachusetts General Laws is hereby amended by adding the following definition:-

“Project,” shall be defined as a development involving the construction of substantial rehabilitation of units of Low or Moderate Income Housing that is the subject  of an application to a Board for a Comprehensive Permit or for an appeal before the Committee and as further defined by regulations. To be considered a project, a minimum of 35% of the units must contain a use restriction for low-income persons, or 50% if for medium-income persons. 

A project may contain ancillary commercial, institutional, or other non-residential uses, so long as the non-residential elements of the Project are planned and designed to:

(a) complement the primary residential uses, and

(b) help foster vibrant, workable, livable, and attractive neighborhoods consistent with applicable local land use plans and state sustainable development principles

(c) are consistent with existing commercial zoning

The total square footage for non-residential elements shall not exceed 15% of the total square footage of the residential segment. The local board may waive this restriction if the project meets smart growth principles.