>Which is is fine, you can change the constitution, but thats for parliament to do.
To which Constitution are you referring? And which "parliament"?
The US Constitution can only be changed by votes by both supermajorities in both houses (House of Representatives and Senate) of Congress and the legislatures of 3/4 of the several states. We don't have a "parliament."
Are you referring to Canada's Constitution? Australia's? AFAIK, the UK has no Constitution and changes to Ireland's Constitution requires a national referendum.
Please do elucidate. Thanks!