PDFWAC 332-52-150
Fireworks.
May fireworks be used on department-managed lands? No. Except for legal firearms, persons shall not discharge or possess fireworks, model rockets, or other devices containing any explosive or flammable compounds on or into any department-managed lands. For purposes of this section, "fireworks" means any composition or device designed to produce a visible or audible effect by combustion, deflagration, or detonation, and which meets the definition of pyrotechnic articles or consumer fireworks or display fireworks.
Any violation of this section is a misdemeanor.