Notwithstanding the provisions of § 13.1-855, a nonstock corporation shall have a board of directors consisting of at least twelve but no more than twenty members. A majority of the members of the board of directors of a nonstock corporation operating a dental services plan shall be participating dentists. A majority of the members of the board of directors of a nonstock corporation operating an optometric services plan shall be participating optometrists.
Va. Code § 38.2-4508