Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 160, § 172A

Every railroad corporation shall equip each locomotive used by railroad crewmen with pure refrigerated drinking water with individual, disposable cups; maintain toilet facilities on locomotives or cabooses, if cabooses are used, in a working sanitary condition; and ensure that each such toilet facility provides privacy to a person using such facility.

For the purpose of this section “sanitary condition” shall mean a condition of good order and cleanliness which precludes the reasonable probability of disease transmission.