Mass. Gen. Laws ch. 183B, § 53
(a) If a purchaser may participate in any exchange program, the developer, agent of a developer or person in the business of selling real estate for his own account shall, except as provided in subsection (b), deliver to the purchaser at the time of delivery of the public offering statement required by section thirty-seven, written information regarding said exchange program and the purchaser shall certify in writing to the receipt thereof. Said information shall include the following: