Yes, changes can be made to a ROL after it has been certified.
The program director can click on the ‘Edit List’ button in the R3 system and enter their password to return the list to Ranking status so changes can be made. The ROL can be modified or re-ordered any number of times; however, if a certified ROL is changed in any way, the new version MUST be re-certified in order to be used in the Match, and certification must be completed by 9:00 p.m. eastern time on the applicable Rank Order List Certification Deadline. No additions, deletions, or changes can be made to your rank order list after the deadline. Please note that the R3 system does not retain previous versions of a ROL, regardless of whether it was certified.