Ohio Revised Code Title V. Townships § 511.19

(A) Except as provided in division (B) of this section, the board of park commissioners shall consist of three electors. The electors may be residents of the township or of any municipal corporation that is located within the township, that was within the township at the time that the park district was established, or the boundaries of which are coterminous with or include the township. One of the commissioners shall serve for one year, one of the commissioners shall serve for two years, and one of the commissioners shall serve for three years, from the second Monday of May succeeding the appointment, and thereafter one commissioner shall be appointed annually to serve for three years. The court of common pleas, or the board of township trustees if the board of park commissioners is appointed by the board of township trustees, shall fill any vacancy that occurs in the board by death, resignation, or otherwise, by appointment for the unexpired term.

(B) If a board of park commissioners is appointed by the board of township trustees, the board of township trustees may appoint a five-member board of park commissioners in lieu of the three-member board provided for in division (A) of this section. Except as provided in this division, members of a five-member board of park commissioners shall serve three-year terms. Of the initial appointees, two shall serve one-year terms, two shall serve two-year terms, and one shall serve a three-year term. Thereafter, terms of office for successive appointees shall be for three years. All terms shall commence on the second Monday of May succeeding appointment. Qualifications for members and filling of vacancies on five-member boards shall be the same as provided in division (A) of this section for three-member boards.

(C) A board of township trustees, by resolution, may convert a three-member board of park commissioners that the board of township trustees has appointed to a five-member board of park commissioners. The conversion shall be effective from the second Monday of May succeeding the adoption of the resolution. If a three-member board is converted, any member of the three-member board whose term had not expired on the date of conversion shall serve as one of the five members of the new board until the expiration date of that member's term.

(D) A board of township trustees, by resolution, may convert into a three-member board of park commissioners a five-member board of park commissioners that the board of township trustees has appointed. Upon the expiration of the terms of one or more park commissioners on the second Monday of May that immediately follows the date of the resolution's adoption, the board of township trustees shall appoint one park commissioner to a three-year term. Upon the expiration of the terms of one or more park commissioners on the second Monday of May in each of the immediately following two years, the board of township trustees shall appoint one park commissioner to a three-year term. During the transition period from a five-member board to a three-member board, any member of the five-member board whose term has not yet expired shall continue to serve as a member until that member's term expires.