Barbara, I think you could just use "legitimacy" by itself here, when you think about its meaning:
"The word legitimacy comes from the Latin word legitimare and it has two uses:
* Legitimacy (political science) is variously defined, but refers in general to the peoples' acceptance of a law, ruling, or a regime itself as valid. This concept has also been applied to other kinds of authority, such as that of an employer hiring workers. The Marxian tradition discusses issues concerning the legitimacy of entire political-economic systems (such as capitalism)."
http://webcache.googleusercontent.com/search?hl=fr&rlz=1G1GG...So it incorporates the sense of "general acceptance", which is also what the term "de référence" is pointing to, surely. I'm thinking the French is leaning towards the tautological (not unusual!).
But if you do think it needs qualifying, you could try "acknowledged" or "unarguable" maybe? Hope this helps, on a rainy Sunday afternoon!