the Salmon/Steelhead Bobber Fishing Rules (leader length limited to 36") only applies to specific locations, it says that clearly on page 12, same thing for the Anti-Snagging Gear Restriction Rules.
I see anti-snagging rules for Big Creek, Three Rivers, Coos Bay, N. Umpqua River, Rogue River, and Eagle Creek.
I see Bobber fishing rules for S. Fork Santiam River, Winchuck River, N. Umpqua River, Chetco River, Trask River, and Salmon River.
Check where you will be fishing to be sure! cheers, roger