With still more that 30min of fuel left but burning fast the Pilot can declare "Minimum Fuel" and ATC will TRY to prioritise the clearance to land. With 30min or less, "MAYDAY Fuel" can be declared and any ATC MUST allow the airplane to land (in many cases even at an Army airport), then assessing any needed paperwork later once is safely down. This is what they did - I also see no drama but should have been avoided wit proper paperwork in place