riod starting on the date on which the immediately preceding Data Reconciliation occurred (or, if no Joint Business Day occurs which is within such PR Period and is on or following the date such notice is effective, the first Joint Business Day following the later of the end of such PR Period and the dat

back Date. "PR Fallback Date" means: (a) in respect of the PR Period starting on the PR Requirement Start Date, the last Joint Business Day in such PR Period; and, otherwise, (b) the last Joint Business Day in the PR Period starting on the calendar day immediately following the last calendar day of the im