When it comes to those individual rights assured by the Constitution and enumerated in the first 10 Amendments, precedent shows you can sue INDIVIDUALS within government entities in addtion to the entities themselves.
Sue the Mayor and every member of the Council who voted for this crap.
Sue 'em for everything they have.
Not only can you sue them but you can file a complaint with the attorney general for deprivation of civil rights and criminal conspiracy to deprive one of those rights. It is definitely a conspiracy.
If we hit these bastards hard enough each time they try these phoney baloney tactics they will soon wise up. The gun-owning public should start these cases by filing civil rights complaints where ever necessary.
You cannot tax me or charge me a fee to allow me my rights (ccw permits should be free!). You cannot require me to undergo examinations to obtain my rights. You cannot make me sign incrimination statements to enable me to exercise my rights. If the government suspects that I am a criminal or a mental defective the task and burden proof is up to them.
You cannot limit my rights to suit your political need.