Mass. Gen. Laws ch. 260 § 4C
Actions of tort alleging the defendant sexually abused a minor shall be commenced within 35 years of the acts alleged to have caused an injury or condition or within 7 years of the time the victim discovered or reasonably should have discovered that an emotional or psychological injury or condition was caused by said act, whichever period expires later; provided, however, that the time limit for commencement of an action under this section is tolled for a child until the child reaches eighteen years of age.
For purposes of this section, "sexual abuse" shall mean the commission of any act against a minor as set forth in section thirteen B, 13B1/2, 13B 3/4, thirteen H, twenty-two, twenty-two A, 22B, 22C, twenty-three, 23A, 23B, twenty-four, 24B or subsection (b) of section 50 of chapter two hundred and sixty-five or section two, three, four, four A, four B, seven, eight, thirteen, seventeen, twenty-nine A, thirty-four, thirty-five or thirty-five A of chapter two hundred and seventy-two.
Mass. Gen. Laws ch. 260, § 4C