CIL transition regulations relating to Universal Undertaking - Public forum - Planning Advisory Service (PAS)

Where a planning permission is granted prior to the CIL implementation date but is subject to a Universal Undertaking by the applicant. If the UU is satisfied after the CIL implementation date, and therefor the planning permission is implemented after the effective CIL date, would the applicant be liable for a CIL payment? In this situation a decision notice has been issued approving the development, subject to the UU and other pre commencement conditions. The CIL relates to a cessation of a Use on an adjoining site under the control of the applicant.

All feedback appreciated. Thanks William