No person shall build, construct, erect, put up or maintain any building, structure,
fence, wall, monument, dome or other thing in or upon any park, square, avenue, grounds
or recreation center without first having obtained a permit from the director. Any
such building, structure, fence, wall, monument, dome or other thing shall not prevent,
hinder or impair the full and free use and enjoyment by the public of such park, square,
avenue, grounds or recreation center for park purposes.
