Last week, NATA joined the Joint Aviation Community (JAC) in submitting Comments in response to the Federal Communications Commission (FCC) “In the Matter of Upper C-band (3.98 to 4.2 GHz)” Notice of Proposed Rulemaking (NPRM). The JAC’s comments recognized the importance of efficient spectrum usage to support continually advancing communication technologies, while emphasizing the necessity of preserving the highest levels of aviation safety. The proposal stems from Section 40002 of the One Big Beautiful Bill Act, which directs the Federal Communications Commission (FCC) to allow competitive bidding for no less than 100 megahertz of spectrum in the Upper C-Band. The NPRM sets forth the proposed rules governing the 2027 auction. The JAC also conveyed to the FCC that the scope of the related FAA NPRM on improved radio altimeter performance would require every aircraft operating with a radio altimeter within the contiguous United States to be modified or replaced. It is imperative that air charter operators and the business aviation industry recognize the significant impact of the FCC and FAA proposals.