Massachusetts General Laws Part II. Real and Personal Property and Domestic Relations (Ch. 183-210) Ch. 184, § 26

All restrictions on the use of land or construction thereon which run with the land subject thereto and are imposed by covenant, agreement, or otherwise, whether or not stated in the form of a condition, in any deed, will or other instrument executed by or on behalf of the owner of the land or in any order of taking shall be subject to this section and sections twenty-seven to thirty, inclusive, except (a) restrictions in leases, mortgages and other security instruments, (b) restrictions in orders of taking by the commonwealth or a political subdivision or public instrumentality thereof made before January first, nineteen hundred and seventy and (c) conservation, preservation, agricultural preservation, and affordable housing restrictions, as defined in section thirty-one which have the benefit of section thirty-two, and other restrictions held by any governmental body, if the instrument imposing such conservation, preservation, agricultural preservation, affordable housing or other restriction is duly recorded and indexed in the grantor index in the registry of deeds or registered in the registry district of the land court for the county or district wherein the land lies so as to affect its title, and describes the land by metes and bounds or by reference to a recorded or registered plan showing its boundaries. “Governmental body”, as referred to in this section and sections thirty-two and thirty-three, means the United States or the commonwealth, acting through any of its departments, divisions, commissions, boards or agencies, or any political subdivision or public instrumentality thereof or any public authority or any quasi-public entity or any instrumentality created pursuant to chapter forty F, whether acting for its own account, or as agent or designee for or assignees of any private individual or private entity which has been required to place such restriction in its chain of title as a condition to receiving financial or other assistance from the United States or the commonwealth, acting through any of its departments, divisions, commissions, boards or agencies, or any political subdivision or public instrumentality thereof or any public authority or any quasi-public entity or any instrumentality created pursuant to said chapter forty F.

For the purposes of this section and sections twenty-seven to thirty, inclusive:--