I am not sure if this is helpful or not. The following is quoted from AC-20-165A which specifies a means of obtaining FAA approval for installation of ADS-B Out equipment:
(2) Turning off ADS-B. 14 CFR 91.225 requires that all aircraft equipped with ADS-B OUT operate with the equipment turned on at all times. There are no requirements to disable ADS-B broadcasts at the request of ATC. When ADS-B functionality resides in the Mode S transponder, it is acceptable to disable the ADS-B transmissions by disabling the transponder (i.e. Standby or Off). If this architecture is used, specify the impact in the flight manual or pilot’s guide, (e.g., loss of ADS-B, transponder and TCAS functionality). Locate the ADS-B on/off controls to prevent inadvertent actuation.
In General Aviation, Garmin is a major provider of Mode S transponders with ES capability. They have a configuration setting that permits the pilot to turn off the ADS-B Out function. It is noted that it may only be used at ATC request. The AC 20-165A says this is not required, so I would not recommend setting the configuration to enable this feature for a General Aviation aircraft. I presume that the airline will or should provide information on how to deal with this issue. They still have more than 6 years to do this before the regulation kicks in.