Best way to setup running someone else's truck under my authority?

Would appreciate any guidance regarding running someone else's truck under my authority... This is my first time doing this so I'm a bit confused about how to set things up properly. The plan is to split everything 50/50 (expenses and profits) - he provides the truck and I run it with my authority/driver

1) How do I add this truck to my authority? What information/documents do I need from the truck owner?
2) Truck would be added to my insurance, any special requirements I should be aware of? Does the truck owner need to get any separate insurance like bobtail? Who's responsible for what coverage in cases like this?
3) Anything else I should be aware of?

Thank you