As far as I know, you will need a Parking brake for safety inspections in every state.
Cars haven't had Emergency brakes in decades.
Trying to get rear discs (with little drums inside for brake shoes or mechanical pad hardware) to stop a vehicle that is moving at more than 5 mph is whistling in the wind.
Most of them are poor parking brakes as well, because nobody ever uses them and they rust up. The most annoying thing I have to deal with is getting parking brakes to work once a year to pass inspection.
Just figure out the minimum to get through your states requirements. And yes, if you have a driveshaft hand brake you're golden (if you drag it a couple times a year to get the rust off the drum).
