^ Hence my statement quoted below.*
(Of course, authority is all that matters when that authority has exclusive legal right to the texts in question.)
That said, I don't think that Paramount or CBS particularly cares to establish a canon for Star Trek (well, 2009's Star Trek is canon, but I doubt anything else is).
Actually, CBS and Paramount have been pretty clear that the Star Trek canon consists of Star Trek (1964; 1966-1969), Star Trek: The Motion Picture (1979), Star Trek II: The Wrath of Khan (1982), Star Trek III: The Search for Spock (1984), Star Trek IV: The Voyage Home (1986), Star Trek: The Next Generation (1987-1994), Star Trek V: The Final Frontier (1989), Star Trek VI: The Undiscovered Country (1991), Star Trek: Deep Space Nine (1993-1999), Star Trek: Generations (1994), Star Trek: Voyager (1995-2001), Star Trek: First Contact (1996), Star Trek: Insurrection (1998), Star Trek: Enterprise (2001-2005), Star Trek: Nemesis (2002), and Star Trek (2009).
This has never changed.
I suppose that you might say that the canon of Star Trek is composed of a series of well-known facts and impressions, not any particular works. It is accepted as genuine that Vulcans have green blood, Kirk fought Khan in the Mutara Nebula, etc. But the specifics of stories that made no vivid impression are of no consequence. In many ways, its a lot like mythology.
You are confusing "canon" with "continuity."