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TIDA-020011: frequency range for automotive in-cabin usage

Part Number: TIDA-020011
Other Parts Discussed in Thread: AWR1642,

TIDA-020011 uses AWR1642 that operates in the 77 GHz automotive frequency range for gesture control.  However, in the FCC Equipment Authorization Guidance for 76-81 GHz Radar Devices, April 12, 2019, footnote 3 states that "Radar devices intended solely for automotive in-cabin usage are not permitted under these rules."

https://apps.fcc.gov/kdb/GetAttachment.html?id=%2Fx%2Br4gdJBN%2Fufbbqx7TXBg%3D%3D&desc=653005%20D01%2076-81%20GHz%20Radars%20v01r01

Do you know what frequency range would be appropriate for automotive in-cabin usage?  Are you aware if there exist any other automotive applications that cannot be validly operated in the 76-81 GHz frequency range?  None of the language of Part 95 Subpart M gives an indication of this.