Thanks for those questions.
For the first part, maybe what I would add is it would be a benefit of up to $467 for a family with two children. That's the maximum amount. Also, for a single individual without children, the maximum benefit would be $234. When the government talks about $225 for seniors, that's an average, recognizing that some individuals who are currently on the phase-out zone for the GST credit will receive a partial amount, so less than the maximum. I think you've captured it well with those amounts.
In terms of timing, I can just point to what's in the budget, that the government will endeavour to have the CRA pay this out as soon as possible following royal assent, if it's passed by Parliament.