Randomness of Fuel Contracts

[minerva]

So, the fuel contract system is obviously pretty random, but a question: at any given moment at a specific airport are all the airlines offered the same choice of contracts, or are they entirely unique to each airline?  I strongly suspect the latter, but does anyone know for sure?

[Sanabas]

They appear to scale somewhat with airline size, which suggests they're unique. BKing and restarting in the same airport resulted in a different set of contracts, too. That's not definitive, though.