Maybe I'm misremembering, but I thought Facebook's solution to the Washington law was to no longer run political ads in Washington.
Testing this out right now, from my home in Washington, if I try to create an ad and mark it as political, I'm told I need to get authorized to be able to run such an ad.
It seems like FB failed to successfully prevent people running political ads in Washington, because on encountering the roadblock you identified, the ad customers just unchecked the "this is a political ad" checkbox.
Testing this out right now, from my home in Washington, if I try to create an ad and mark it as political, I'm told I need to get authorized to be able to run such an ad.