Mass. Gen. Laws ch. 30B, § 22: Cooperative purchasing agreements between public procurement units or public procurement unit and external procurement activity

Section 22. A public procurement unit may participate in, sponsor, conduct or administer a cooperative purchasing agreement for the procurement of supplies with public procurement units or external procurement activities in accordance with an agreement entered into between the participants. The public procurement unit conducting the procurement of supplies shall do so in a manner that constitutes a full and open competition.