Any face to face transaction in Multnomah County has to be carbon neutral. If one of you takes a car then the other needs to ride a bike. The gun can only be transported in a re-usable cloth bag, absolutely NO plastic! If you are the seller then you are the one required to provide a Spanish translator for the transaction. (NOTE: We are still waiting on a court decision regarding whether this translator has to be state certified or just certified by the county) Please keep in mind that for every nickel/stainless gun you sell you must also offer a black colored gun of equal value for consideration.
In all seriousness the city/county can't write their own "laws" but they can write ordinances. If both parties have an Oregon CHL then our preemption statute provides you with pretty good protection from the insanity. I'm not a lawyer, just play one on the internet. Always recommend reading for yourself
ORS 166.