I'm sure cops are exempted while on duty
just like the other cell phone ban
funny, since most of the bad drivers I see yapping on cell phones are cops in patrol cars. the time I remember most was this female cop over by south campus. yapping away, laughing and smiling, holding the phone to one ear with one hand, waving the other hand around in the air. based on body language I highly doubt that call was "official police business"

she almost side swiped two other cars in the other lane while doing this