...contains the regulations governing certain aspects of building structures in Massachusetts; prior to 1975 each municipality had its own code; for history of early editions of the state code through 1979 (?) see note inserted by the Government Documents Department in the front of the 2nd edition (1977 version); for some editions the Library has several versions that include changes for varying time periods; the 2nd edition (1975) also appears as volume 3 of the original CODE OF MASSACHUSETTS REGULATIONS (GOVDOC/KFM2435.5.S4C6X/VOL. 3); the 3rd edition (1979) is only available (as of 16 March 1993) as volume 18 of the 2nd edition of the CODE OF MASSACHUSETTS REGULATIONS (GOVDOC/KFM2435.5.S4C6X/1970/VOL. 18); the 4th edition (1980) is also available in the 3rd edition of the CODE OF MASSACHUSETTS REGULATIONS as volume 22; the 5th edition is also available as MASSACHUSETTS REGISTER 643 supplement and 647 supplement; all editions of the BUILDING CODE are updated by the MASSACHUSETTS REGISTER...