Section 412.250 - Sources of MGCRB's authority(a)Compliance. The MGCRB, in issuing decisions under section 1886(d)(10)(C) of the Act, complies with all the provisions of title XVIII and related provisions of the Act and implementing regulations, including the criteria and conditions located at § 412.230 through § 412.236 , issued by the Secretary under the authority of section 1886(d)(10)(D) of the Act; and CMS Rulings issued under the authority of the Administrator.(b)Affords great weight. The MGCRB affords great weight to other interpretive rules, general statements of policy and rules of agency organization, procedure, and practice established by CMS.55 FR 36766, Sept. 6, 1990, as amended at 56 FR 25488, June 4, 1991