Mass. Gen. Laws ch. 111, § 72V

Every nursing home, rest home, or other long term care facility shall provide adequate and secure storage space for the personal property of each resident. The department shall promulgate regulations specifying methods to protect such property, including regulations providing individual access to each resident to said resident's private storage area which may include a locked drawer, to which each resident shall have a key, except that the administrator or his designee of each such facility shall hold a master key to any such locked spaces.