Per NEST SOP:
"If an employee was a CPC at their previous facility, who subsequently withdraws or is terminated from training at their current facility, and has submitted a written request to return to their previous facility and not receive a listing of facilities, the ATM will: Submit training termination memo along with Previous Facility Return Option statement and notify the Program Manager of the Air Traffic Services Team and the Service Center POC of the request to return to their previous facility. If the facility is below the 100% projected CPC to Target, then the employee will be placed at their previous facility. "
Technically I don't think they have to, but I've also talked to a former Facrep that said he'd seen people get send back to their old facility when they were over 100% projected to CPC to Target.
Probably depends how management wants to play it.