No person shall, by a special contract with his employees, exempt himself from liability which he may be under to them for injuries suffered by them in their employment and resulting from the negligence of the employer or of a person in his employ.
Mass. Gen. Laws ch. 149, § 177A
Contract exempting employer from liability to employee
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.