Not sure what angle your question is coming from. I'm at home, can't check our RIP version number; think it's 6. But, Co Res will be on your RIP IF it was ordered originally, or added on later. The only way to verify, (I assume you have access to the RIP), is to dig into the screening area and see if it's listed.
If you're just making a general enquiry, well, it's an optional/additional screening.
You should now seriously consider migrating your Celebrant (Adobe CPSI based) to XMF (Adobe PDF Print Engine based). If you have a Celebrant RIP you can either transition to XMF Processor (RIP) or up to the full XMF Workflow (4-up or complete, depending on your output format). If you have Celebrant Extreme workflow you can transition that to XMF Complete. Your existing Co-res screening licence transfers to XMF without charge (as does Taffeta FM screening licence). All of the Celebrant drivers that you may have (output drivers, TIFF drivers, proofer drivers) also transfer without cost. If you have Serendipity Blackmagic proofing/pressroom proofing taking ripped data from Celebrant you'll need to get the XMF input filter to upgrade that.