Eddie, that's true. But remember - rules for CCS, WERA and N2 are not all necessarily the same. N2 Advanced is pretty close to CCS but not exactly the same. WERA is a bit more draconian in terms of what needs to be wired. Sometimes there are some caveats too - such as using a dab of silicone in place of safety wire.
But in any case - oil filters and drain plugs should be safety wired. No clips. No silicone.
This, BTW is a VERY good point to bring up for tech. We're starting to see more and more brand new R1's and '17 GSXR1000s coming through tech. Those rocket ships are almost track ready right off the dealer floor - EXCEPT they don't have drain plugs or filters wired.
PLEASE!!!!! If you're in Advanced it's MANDATORY - and if you're in Intermediate, it's pretty darned close. Safety wire those oil drain plugs and filters. Also, even though it's not required, I recommend safety wiring your radiator cap. We would all feel very bad to turn away a bike and rider who drive 8 hours to an event because they can't pass tech. And if you're in Intermediate but are hoping for a bump to Advanced, do yourself (and others) a big favor and prep your bike to Advanced standards! Even if you're in Novice, but are spending a good bit of time on the track, do yourself a favor and avoid leaking oil ending up on your rear tire.
If there are enough questions and a group of people want a quick tutorial on prepping a bike, let us know and maybe we could do a quick seminar/demo in the evening at an event or two.