Nothing in this Act shall be deemed to relieve any owner, administrator or employee of a facility placed in receivership of any civil or criminal liability incurred, or any duty imposed by law, by reason of acts or omissions of the owner, administrator, or employee prior to the appointment of a receiver; nor shall anything contained in this Act be construed to suspend during the receivership any obligation of the owner, administrator, or employee for payment of taxes or other operating and maintenance expenses of the facility nor of the owner, administrator, employee or any other person for the payment of mortgages or liens. The owner shall retain the right to sell or mortgage any facility under receivership, subject to approval of the court which ordered the receivership.