I think that's a wonderful idea, but I'd actually propose that you call the Prime Minister who signed the letter that says:
We are writing to urge you to introduce legislation which establishes poverty reduction as the aim for Canada’s Official Development Assistance (ODA). A legislated mandate for Canada’s ODA would ensure that aid is provided in a manner both consistent with Canada’s human rights obligations and respectful of the perspectives of those living in poverty.
If you go to clause 2 of the bill, what does it say but that it's a “manner consistent with Canadian values, Canadian foreign policy”. It promotes human rights. You know, I don't know what else you would say.
In clause 4, it states:
(a) contributes to poverty reduction;
(b) takes into account the perspectives of the poor; and
(c) is consistent with Canada’s international human rights obligations.
Presumably the Prime Minister could have written this bill himself.