§ 4219.11 Withdrawal liability upon mass withdrawal.

(a) Initial withdrawal liability. The plan sponsor of a multiemployer plan that experiences a mass withdrawal shall determine initial withdrawal liability pursuant to section 4201 of ERISA of every employer that has completely or partially withdrawn from the plan and for whom the liability has not previously been determined and, in accordance with section 4202 of ERISA, notify each employer of the amount of the initial withdrawal liability and collect the amount of the initial withdrawal liability from each employer.