Mass. Gen. Laws ch. 128 § 7B
Any person may make application to the bureau of land use on a form to be furnished by the bureau for a permit to use available vacant public land for garden, arbor, or farm purposes. Applicants shall submit a plan for said use and shall agree to maintain the land in a condition consistent with said land use plan, and shall agree to abide by the rules and regulations promulgated by said bureau. Failure to carry out the conditions of agreement shall result in the forfeiture of the garden, arbor or farm permit. Any person who is granted the use of garden, arbor, or farm land shall indemnify and save harmless the commonwealth, the department of agricultural resources and all of its officers, agents and employees against suits and claims of liability of each name and nature arising out of, or in consequence of the use of vacant public land.
Mass. Gen. Laws ch. 128, § 7B