REGULATIONS
Massachusetts Department of Public Health (MDPH) Community Sanitation Program web site, (includes links to regulations)
http://www.mass.gov/dph/dcs/dcs.htm
To go to the regulations directly:
State Sanitary Code Chapter I: General Administrative Procedures
http://www.mass.gov/Eeohhs2/docs/dph/regs/105cmr400.pdf
Minimum Standards of Fitness for Human Habitation (State Sanitary Code, Chapter II)