"Duty Ready" at beginning of shift, so  

Section 16.7

To facilitate customer and Company needs the oncoming Pilot will be duty-ready, as defined in
Appendix A, Section 9, at the beginning of his scheduled shift.

Appendix A: 

Duty Ready: To facilitate customer and Company needs the oncoming Pilot will be duty ready
at the beginning of their scheduled shift. Duty ready is defined as being available to initiate and
conduct revenue or non-revenue flights. The expectation is that a Pilot will accomplish all
required Federal Aviation Regulation and General Operations Manual actions within the time
period that precedes their duty shift.