What is the difference between waveport and lumped port excitation?
A lumped excitation is applied at a single mathematical point, it an be voltage or current
A waveport is applied over a cross-sectional area. Such as the end/beginning of a transmission line on a PCB. You apply it like you would "see" the electrical field between line and GND ...
I did some quick googling and landed on 47 CFR § 15.255 - Operation within the band 57-71 GHz at the excellent Cornell Law Legal Information Institute.
I've quoted some excerpts that I think you'll find relevant:
§ 15.255 Operation within the band 57-71 GHz.
(a)(2)... employed for fixed operation, or used as short-range devices for interactive motion ...