115 CMR, § 1.03
Pursuant to M.G.L. c. 19B, § 18, interagency agreements between the Commissioner of Mental Health and the Commissioner of Developmental Services may be entered into for the coordinated regulation, or for the coordinated or joint management, of certain services or supports that may be required or that should be provided by both the Department of Mental Health and the Department of Developmental Services; provided that no such agreement shall conflict with the Department's primary responsibility for individuals in accordance with M.G.L. chs. 19B and 123B regardless of whether such persons are also mentally ill, nor shall any such agreement deprive any individual who also has mental illness from equal access to services offered by the Department of Mental Health.
115 CMR, § 1.03