9. Any matter which, pursuant to an Act, requires approval by a two-thirds majority of the council members of a municipality, requires a two-thirds majority of the votes of(1) all of the members of the group referred to in paragraphs 1 and 2 of section 6, including the votes cast by representatives of at least three communities included in that group; and
(2) all of the members of the group referred to in paragraph 3 of section 6, including the votes cast by representatives of at least three communities included in that group.