Does the Clarity Act give Ottawa a veto over Alberta independence?

Short answer

No, not in the simple slogan sense.

The Clarity Act does not let Ottawa cancel an Alberta referendum or decide Alberta's final status by itself. It does let the House of Commons decide, for federal purposes, whether a secession referendum question and result are clear enough before the Government of Canada enters negotiations [1].

That matters. If the House finds the question or majority unclear, the federal government cannot enter secession negotiations under the Act [1]. But even a clear vote would not make Alberta independent on its own. The Supreme Court's baseline is that a clear majority on a clear question would create a duty to negotiate, not automatic secession [2].

What this means for Albertans

The Clarity Act is about the doorway into federal negotiations.

Alberta could still hold a referendum under provincial rules [5][6]. But a provincial vote would not by itself force a completed independence outcome. For Canada to negotiate secession, the House of Commons would first assess clarity [1]. For lawful secession to happen, constitutional amendment work would still be needed [3].

So the practical question is not only, “Can Alberta vote?” It is, “Would the question and result be clear enough to move Canada into negotiations, and could those negotiations produce lawful terms?”

What each side gets right

The pro-independence side gets the limits of the “veto” label right. The Act is not a one-word power to erase a clear democratic vote. The Supreme Court said a clear vote on a clear question would have constitutional weight and would trigger a duty to negotiate [2].

The anti-independence / pro-federation side gets the gatekeeping point right. The Act gives the House of Commons a real statutory role before the Government of Canada may negotiate secession [1]. A referendum is not self-executing, and constitutional change would still require more than Alberta acting alone [2][3].

What would have to be decided

• The question: Does it clearly ask about secession, or mix independence with autonomy inside Canada [1]?
• The result: Is the majority clear enough after considering the size of the majority, turnout, and other relevant factors [1]?
• Who acts for Canada: The House of Commons has the statutory clarity role, but it is not the whole constitutional amending process
  3 sources

  [1][3][4]
  .
• The legal route: What constitutional amendments would be required [3]?
• Rights and treaties: How Indigenous and treaty rights would be protected in any negotiation [2][11].
• Political conflict: How Alberta, Canada, other provinces, Quebec, Indigenous governments, courts, and voters would respond
  4 sources

  [2][3][10][11]
  .

What survives both arguments

The useful sequence is that Alberta may be able to ask voters a referendum question under provincial processes [5][6]. The Clarity Act lets the House of Commons assess whether the question is clear before negotiations begin [1]. After a vote, the House assesses whether there was a clear majority [1]. If either test is unclear, the federal government cannot enter secession negotiations under the Act [1].

Current sources support a real federal clarity gate. They do not support either automatic independence or a simple one-person Ottawa veto.