(A) A charter commission shall consist of fifteen registered voters of such county elected by official ballot, without party or political designation, at an election held in accordance with relevant provisions of general law and this chapter. In addition, each county commissioner, or his designee, and the chairman of the county advisory board, or his designee, shall be non-elected members of the charter commission. In order to take into account widely differing population sizes of counties, charter commission members shall be elected at large or individually by district or both as follows: where the inhabitants of a county number less than fifty thousand persons, the election of all charter commission members in such county shall be at large; where the inhabitants of a county number at least fifty thousand but less than two hundred thousand persons, five charter commission members shall be elected at large and ten shall be elected by district; where the inhabitants of a county number two hundred thousand persons or more, the election of all charter commission members shall be by district. The boundaries of the districts, for the purposes of electing charter commission members, shall be determined by the state secretary; not later than June first of the year in which members are to be elected, by dividing the county into districts of contiguous territory so that each representative shall represent an equal number of inhabitants, as nearly as may be.
Such districts shall also be so formed that no town containing less than six thousand inhabitants shall be divided.