This is actually not true.  I just had a conversation with the Intern in charge of this at the Spokane office of the District Attorney (or whomever).  They CAN ticket the vehicle.  They follow up with a "request to appear" notice, which you can do on your appointed court date, or just pay the $50.  If you do not pay, it MAY lead to the swearing out of a bench warrant on your ass.  This may mean nothing, however, I have too much at stake to risk these complications. 
  
If there is no amount, just wait and see.  You will most probably be contacted. 
  
GReg W