Boarding point can be changed irrespective of the status of the ticket - WL or RAC. Recently, the counter clerk informed that boarding point cannot be changed for WL ticket. But, my man met the Reservation Supervisor and requested him to give it in writing. Then the boarding point was changed. It was a boarding point change from mas to ajj by Cheran Express. I have already posted the details in one of my earlier posts about 10 days back.