Tenant shall not, without the prior written consent of Landlord, which may be withheld at Landlord’s sole discretion, voluntarily or involuntarily assign, mortgage, encumber or hypothecate this Master Lease or any interest herein. For the purposes of this Master Lease, the following also shall be considered an assignment of this Master Lease by Tenant: (a) entering into a management or similar agreement with a Person that is not an Affiliate of Tenant or Guarantor relating to the operation and/or control of all or any substantial part of the Premises, but excluding any ancillary service agreements reasonably necessary for the operations of a Facility for its Permitted Use, and (b) any change (voluntary or involuntary, by operation of law or otherwise) in the Person or Persons which Control the management and affairs of Tenant or Guarantor following the Commencement Date.