If any rule or regulation made under authority of section sixty-four of chapter one hundred and fifty-two conflicts with or differs from a rule or regulation of the department, its rule or regulation shall prevail.
Mass. Gen. Laws ch. 149, § 12
Regulations prevailing over regulations of workmen's compensation insurer
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.