body: I was recently watching a video of a police officer who lied to a driver that "a new law passed" that allows police officers to stop someone from recording. The driver was an attorney and knew better.
  
  
  I was curious about this situation where a law changes that you may not be aware of because it only very recently passes. It seems wrong that someone who may have been not aware it was recently changed would be punished. I imagine it depends on the severity of the law, but is there some sort of grace period due to information not travelling fast enough?
  
  
  While I think the above scenario is a little extreme, any advice is appreciated.
  
  
  
title: If a law changes very recently, is there a grace period due to not knowing the new law change?