This whole 'contract' thing is garbage! I'm not saying there aren't any in place - I'm saying that any terms or provisions are extremely limited, and any attempts to have them cover the majority of the earth and its people is bogus. That is, in claiming A, , they're also attempting to add in B, C, D & and all the way to Z.
Even if the US government has agreed to certain goings-on, it only has authorisation to do so over official US territory. If a secret, black ops organisation working 'on behalf of' the US government has signed a deal, without the knowledge of the US government, then even that doesn't hold water.
Any deals done with reptilians does not binding on any other race.
So, 'contract' may well be the wrong word to use here... 'alliance' may be better. In which case, perhaps there's something about the US military will take hostile action towards any non-reptilian craft that comes within Earth's orbit... but that's not a 'contract' in the same sense, and has vastly different ramifications. I sincerely doubt that those in the know would really want to start a galactic - or international - war by shooting down one of these 'good ETs' over a different country! (especially in a highly populated area)
That CB & FS seem to consider this 'contract' something that has merit is beyond me! (other than, sorry to say, they're American)