So, only instructors from 1FTS can get a civvy rating, because they have had the "ab initio" experience. Instructors from 2FTS or FCI courses are apparently not eligible, despite teaching students to operate a more complex aircraft in a more complex environment. That would mean that military helo instructors would be ineligible for the qualification as well, because the students had already passed their F/W wings course.
Sounds like somebody in CA$A has a huge anti-RAAF chip on his shoulder, maybe got scrubbed off a CT4 course.