That is basically what I was going to say.
As well, the way it's drafted, you may be fettering the minister's ability to actually set a higher standard than what ICAO establishes. So it's not only a case of ICAO setting a low standard or the minimum standard; you may actually be preventing the minister from setting anything higher.
Plus, you need to know that the way ICAO works, sometimes they set standards that aren't actually workable or acceptable in the Canadian context. Canada creates its own rules, rules that Canada believes meet an equivalent level or address the problem, and files the difference with ICAO.
So I think it might be a problem if the minister's discretion were fettered that way. It might defeat the purpose of what you were trying to achieve.