And that is one reason why manufacturers deliver rigs configured the way they are. Commercial enterprises must also comply with whatever regulations are set forth. However; private owners can basically do modifications/changes to whatever system they want. Don't want an airbag in the steering wheel; pull it out. Anything that is not an inspection item for ones state inspections is subject to whatever the individual wants to change. These modifications/changes might not be the smart move but there is nothing to prevent he/she from doing it. When was the last time a federal entity took a look at your rig (under your ownership) to check for regulation compliance? No authority what so ever.