Former Senior Case Supervisor, and Hubbard's personal auditor, David Mayo, stated that Hubbard removed the original upper OT levels from the Grade Chart. After all, he was there.
Despite some disagreement, in the "Independent Field," about who removed the original upper OT levels, and disagreement about where those levels should now be on the Grade Chart, there is what appears to be unanimity on the existence of "Dianetic Clear"
"Yay!
I'm Clear!" and support for the changes, made by Hubbard, to the middle grade chart in 1978. (Both the middle Grade Chart and the Dianetics Course were mangled. For example, the word "consideration" replaced the word "somatic" on the Dianetics Course, making Dianetics even more significance-oriented than it already was, and the middle Grade Chart, for most, simply disappeared, with people who, previously, would have been called "Dianetic Case Completions," being shipped "up lines" to begin OT 1.)
Except for Ron's Orgs which appears to reject "Dianetic Clear" since that occurred after the doppelganger switch of 1973.
During 1990/1991, the independent field magazines,
International Viewpoints and the
Free Spirit,
published David Mayo's 1989 article on Clear. By this time, if I recall the dates correctly, Mayo's Independent Advanced Ability Center had been harassed out of existence by Scientology Inc., and he was still working with Sarge Gerbode on designing the subject of Meta Psychology.
Mayo wrote:
"It was PR and marketing considerations that led Hubbard to decide that certain people were 'clear' at a certain point."
This is a sticking point for today's Independent Field, which has difficulty coming to grips with the idea that Hubbard was willing to modify auditing tech, and the Grade Chart, for monetary, or PR, or for other, less than noble, reasons.
This becomes particularly messy with the possibility that Hubbard, from the 1960s, or perhaps from the very beginning,
may have been doing something else, which was different than his stated - publicized - objectives.
The idea is that the "next step" for the Independent Field is not necessarily to abandon everything on which the name "Scientology" or "Hubbard" is stamped, but to grow up, stop being the "Old Man's" children, and re-examine the subject as honest
adults.