It is a misdemeanor under state law to remove or deface a lawfully placed political advertisement, including yard signs or billboards, without authorization.  Misdemeanors are punishable by imprisonment in county jail for up to 90 days and a fine of up to $1,000.

It is illegal to place a temporary political sign within the right-of-way of a state highway.  Rules adopted by the Washington State Department of Transportation regulate temporary political signs located along primary system highways (e.g. on private property) outside of incorporated cities or towns or commercial or industrial areas.  These signs must be removed within 10 days after an election, except that signs for a candidate who is successful in a primary may remain up until 10 days after the general election.  Some jurisdictions also have their own rules for the removal of political signs after an election.  For instance, Pierce County also requires political signs to be removed within 10 days after an election, with the same exception for successful primary candidates.

A definition of "lawfully placed" is added to the statute:  political advertising is not lawfully placed if it remains in place past any deadline for removal provided by law.