Mass. Gen. Laws ch. 92 § 34F
There shall be established and set up on the books of the commonwealth a separate fund, which shall be known as the Middlesex Fells Reservation Trust Fund. The fund shall be used to advance recreational, educational and conservation interests, including, but not limited to, the construction and maintenance of facilities and infrastructure improvements for the area within the Middlesex Fells reservation. The fund shall receive, hold and expend all fees generated by permits, licenses and all other agreements not currently being directed to the General Fund relating to the use of the reservation land as authorized by the commission. The department shall not make expenditures from this fund so as to cause the fund to be deficient.
Mass. Gen. Laws ch. 92, § 34F