Hoi!
As a matter of fact, LangCom does not accept "governments" as regulation sources, not until ISO does it first. The only regulatory source we have is ISO.
This is a protection against all possible political pressure, to which linguistics are always exposed. We don't say that ISO is infallible, we simply say that a larger opinion (i.e., international) is less likely to be biased in favor of somebody's interests. So no government "opinion" (even in form of a law) can be accepted.
If the Italian Government believes that their policy can gather international acceptance by the linguists' community, they are welcome to issue a request for they "opinion" to become a recognized international standard. ISO will issue a code for their new creature, and they can use it in a wiki (but NOT as SC, unless ISO says so). Until then, "Limba Sarda Comune" simply does not exist, as far as LangCom is concerned, because we do not issue any recognition ourselves.
The fact that it.wiki could be requested to accept romanesco, by following the same logics, is an exaggeration. The IT code is clearly identified with "italian standard", while the SC code has nothing to do with "Limba Sarda Comune". It's self evident, since one is classified as a macro-language, the other acts as a single entity that is not classified ANYWHERE.
We DO NOT make rules here, we simply apply them. Tomorrow somebody in Brussels will create a normative "United Romance Language" in order to cut translation expenses, and we will react just in the same way. No wiki until a competent international organ does not assign a code to it.
Having said so, if it.wiki was to accept content in Romanesco, they would help in preserving a very important part of the Italian culture, which I personally would applaud. But nobody can ask them to do so, because they are publishing exactly what they declare to publish (content in ITA). What must be stopped is an illegal redefinition of an international ISO code. That much is "policy". Romanesco has all my sympathy, but no official recognition, and my own opinions are but opinions, not a policy.
We stopped BE-x-old from occupying a code; we cannot be nicer to Italians when they have the same faults. When there is a policy it applies to everyone. We have an Italian citizen in LangCom, another in the Board, plus a German citizen resident in Italy who is chairing LangCom. The situation would be fairly easy to interpret as a "mafia creep" by the rest of the planet. Well, no favors to relatives here, rules are rules for everybody, no matter where they are from.
Hope it's clearer now.
Bèrto d Sèra Personagi dlann 2006 për larvista american-a Time (tanme tuti vojàotri) http://www.time.com/time/magazine/article/0,9171,1569514,00.html