The claim states 'One third of those surveyed across the province's population are in favour of the referendum.' The web search results mention a survey regarding a referendum, but none of the provided snippets specify that exactly one third (33.3%) of the population favored it. The evidence is insufficient to confirm the specific fraction.

While the web search results confirm the existence of a referendum and the general topic of Alberta separatism, none of the provided sources explicitly state that this planned referendum is the first of its kind since the failed Quebec independence referendum in 1995. This specific historical comparison is not supported by the evidence.

The web search results confirm that separatists face federal pushback (e.g., 'federal pushback' is mentioned in the context of the movement) and that First Nations are present in Alberta. However, the evidence does not provide specific details about lawsuits from First Nations communities, nor does it confirm the accusations of 'treason' or 'foreign interference' coming from the First Nations communities themselves. These specific accusations are not independently verified.

The claim uses the highly specific and potentially misleading nickname 'North Texas' for the oil-rich area of Canada. While the evidence confirms the region is oil-rich and is the focus of independence hopes, it does not corroborate the specific nickname 'North Texas' or the claim regarding the 'world's third-largest proven oil reserves' in this context.