How to Prevent Time cards with zero hours from bypassing the approval process

Currently the only rule we have for TimecardApproval (under SoaOLabel.PayrollTimeCardApprovers) is as follows

If 1 is 1

Then

HierarchyBuilder.getManager("supervisory",Task.payload.process.Requester,-1,null,"LINE_MANAGER")

the problem here is that when an exempted employee submit a blank time card (0.00 hours) it bypasses the approval process and it "auto approve", we need to prevent this.

this is for Time and Labor Fusion Cloud 24C