For meetings of a regional or district public body, notice shall be filed and posted in each city or town within the region or district in the manner prescribed for local public bodies. For meetings of a regional school district, the secretary of the regional school district committee shall be considered to be its clerk and shall file notice with the clerk of each city or town within the district and shall post the notice in the manner prescribed for local public bodies. For meetings of a county public body, notice shall be filed in the office of the county commissioners and a copy of the notice shall be publicly posted in a manner conspicuously visible to the public at all hours in the places as the county commissioners shall designate for the purpose.
For meetings of a state public body, notice shall be filed with the attorney general by posting on a website under the procedures established for this purpose and a duplicate copy of the notice shall be filed with the regulations division in the state secretary's office.
The attorney general may prescribe or approve alternative methods of notice where the attorney general determines the alternative methods will afford more effective notice to the public.
Mass. Gen. Laws ch. 30A, § 20