any official terminology? Nomenclature versus Taxonomy

[Edwards, G.B.]

Point taken.  I need to get my semantics straight.  In this case, I
should have said official, in the sense of "last published."
GB Edwards

...The term "valid" is another like
"official" that has different meanings and is thus subjective due to the
(unknown) interpretations of the speakers and hearers.   Per the ZN
Code,
there can only be one "valid" species name for a taxon.   So in that
sense,
no there can not be several simultaneously valid specific names.  But in
regard to species genus combinations there can be several valid
combinations because these are a matter of taxonomic concept.   Here is
a
simple example -- Aus bus or  Gus bus or Aus (Gus) bus.    None of these
are "wrong".  Thus, all are valid, each to the concept of the taxonomist
that employs it as such.

Ron Gatrelle