Add restriction to Pay Cycle (AP_APY2015) when Select Payments

Hello,

I need to do this:

1) Add a custom check box field in the VOUCHER page.

2) Add a restriction in Pay Cycle (AP_APY2015) that follows the next business rule: Only when custom check box field in the VOUCHER page is active, the voucher is selected for payment.

I have already made a trace in AP_APY2015 process but I can't figure out where I need to add my restriction.

Any guidance wold be greatly appreciated!