In any county which has adopted or shall adopt the provisions of this act, the board of chosen freeholders shall by resolution passed by the affirmative vote of a majority of the whole board, elect a county park commission consisting of 9 residents of the county, to be known as "the county park commission" (inserting name of county).
In any county which has heretofore adopted the provisions of this act the said county park commission shall consist of 9 members instead of 5 members and the 4 additional members shall be appointed by resolution passed by the affirmative vote of a majority of the whole board of chosen freeholders.