Correct; FCAW is not prequalified in D1.5. Another overlooked requirement is that the brand of wire is an essential variable, and electrode size.
Whoever is designated by your company as the "knowledgeable welding poerson", "test administrator" or whatever you want to call them is just fine. Note that D1.5 PQRs require a third party witness unless waived by the customer. (Might as well have it witnessed anyway ' cause you will want to use the samr PQR for other customers.)
Another factoid, D1.5 PQRs are only good for 5 years (3 years for Fracture Critical)
I strongly recommend that you do get a copy of D1.5. There are a lot of little "nuances" that are easy to overlook. Such as Carbon Equivalency of the test plate, min/max heat inputs, small differences in technique, and so on. You will want to mark up your own copy.
Another often overlooked point, if you will be qualifying fillet welds, you ought to run your filet test first to establish your groove parameters. Up to and including 5/16" horizontal fillets must be made in one pass with FCAW. It is not unusual for a groove PQR to qualify a heat input too low to accomplish that.
As I said, if you can qualify to D1.5, the other codes should be gravy.
Chet Guilford