And there are state and federal regulations of fuel trucks that travel
the roads... You are gonna need the appropriate licenses and permits to
haul flammables, DOT inspection and waiver, EPA inspection, bonded
drivers who have a CDL with flammables endorsement, commercial license
plates on the vehicle, business registration, liability insurance, DBA
filed in the counties were you do business...

You will, as others pointed out, also need a contract with the airport
authority to run a business on their property, permit for signage, 24/7
business telephone number in case of a spill, identity card, HSA
background terrorist check, random drug and alcohol testing plan,
workmans comp insurance, etc... In addition at bigger airports, fueling
(other than personal fueling from hand held cans) has to be done on a
containment pad..
Once you have done all this you are unlikely to have enough money or
credit left to fill the fuel truck...

Welcome to the 'free' USA...

denny