- a national antenna down-tilt requirement to protect aircraft used in low altitude military operations, search and rescue operations and medical evacuations all over the country
That's interesting considering the 5G signal is beam forming (with a couple of lobes near the antenna). Perhaps they mean "software" down-tilt but I don't know if the 5G tech is that far developed. Theoretically it should be possible to fix this issue in software for antennae located near airports as it's all just crazy mathematics anyway.
As someone who has worked with the greedy mobile telecoms, I can assure you they will fight tooth and nail to maintain their market advantage, but they also understand liability too well so I am pretty sure this whole issue was unforeseen by them as it takes years and much expense to get their wares out to market, and now the bureaucrats have been left to sort it out the only way they know how.