FragRad
Hi, you've already mentioned the "danger" in your post. I thought ROC was no longer approved. I would amend or insert into your MATS part 2 that you will not accept a ROC release....as a safety measure. Ask the centre for a more specific release. As a courtesy write to the centre ATC Ops informing them of your decision and I'm sure they will advise the relevant sector[s]. Rgds.
P.S. If you wish, you could run it by your ATC Inspectorate if you want to discuss it further.....they are good people....send them a copy at least.