When you have appealed as far as possible, you can consider appealing to the U.S. Supreme Court. If you decide to appeal to the Supreme Court at this stage, the next step is to prepare a petition for certiorari. This is the document the Court will read in order to decide whether to hear a case.
Commercial applications have an even broader spectrum of change-out frequencies. Air filters in restaurants are commonly changed every 4 to 8 weeks depending on the customer traffic and filter type.. Retail chains, strip malls, and other small businesses vary, but usually are in need of a change every 12 weeks.
why you should change your cabin filter you should change the cabin/pollen filter once a year because if you don,t your demisters will not work propery and the air inside your vehicle will not be very fresh.if you havn,t changed it for years do it now and you will see a big difference...hope this will help someone...