The members of the board of directors of a not-for-profit corporation when acting pursuant to this chapter or chapter 58 of this title are deemed to be within title 12, chapter 4, part 1, relative to conflicts of interest, and the meetings of such board shall be subject to title 8, chapter 44. This section shall not apply to any county with a metropolitan form of government and having a population of four hundred thousand (400,000) or more, according to the 1980 federal census or any subsequent federal census.