(JET Exam ) I think in the notification they didn’t mention about backlogs or percentage of marks. You can apply if you met the eligible criteria mentioned in the notification . ( joint Employment test )
but i think Candidates whose results will be/was declared before JET Exam result , they are eligible to apply the JET examination. It means that backlog candidates can’t appear in the examination.
if you have any queries regarding JET Exam They Provided Official email Address firstname.lastname@example.org