You mean "official" ?

hmm, how do I explain that one ?
Read my earlier post on this thread, there's a clue.
It's where the mechanical systems go into a "grey" area when forces of nature and the unexpected changes things to make it so,then it causes one to cast opinions due to those unexpected circumstances, then it may be reflected by the Opening Price.
That OP may be of the opinion of one, who causes another to follow, but it may not.

In short,
there are Odds and True Odds. Which one is it?
Who, or what will one use to fill in the blank where it say's Openers, so as to ultimately determine if it's going to be a bet or a no bet?

I don't know how else to answer, "official"