The effect was that the only bilingual statute in Alberta at this time is the Act abolishing French before the legislature. Consequently, in the absence of any other statute, that is becoming the basis of the Alberta government's language policy. That is why there is currently a francophone in Alberta disputing the basis of that act. He is challenging the clause that you referred to and that appears in the Mercure decision. In fact, he claims it was unconstitutional to overturn the language regime in Alberta. So it's a constitutional clarification that's before the Alberta Court of Appeal.
On November 3rd, 2011. See this statement in context.