Chapter 40R: G.L. c. 40R (2004 Mass. Acts 149, § 92), a state law that provides for overlay districts
with variable densities for residential development and multi-family housing by right (subject to site
plan review). At least 25 percent of the units in a Chapter 40R district have to be affordable to low- or
Community Preservation Act (CPA): G.L. c. 44B (2000 Mass. Acts 267), the Community Preservation
Act, allows communities to establish a Community Preservation Fund for open space, historic preservation, and community housing by imposing a surcharge of up to 3 percent on local property tax bills.