There is some discussion on the various forums about the requirements of them if using something like the Andersen gooseneck mount style hitches.
Seems maybe it is State dependent.
Not required for 5th wheel plate style hitches.
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.
Days Camped: '17=30 ☼ '18=51 ☼ '19=58 ☼ '20=98