It is unlawful for any person to use park property in a manner inconsistent with a park use, including but not limited to excavating for, erecting or installing or doing any act as part of or commencement of excavation, erection, or installation for, a permanent or temporary structure or facility in or on any park. Nonpark use of park property requires written authorization by the City Administrator in the form of a Nonpark use permit. Sections 20.08.010 and 20.08.020 do not apply to nonpark use permits.