By removing that clause, you're basically saying that requirement would not be in the act any longer. The requirement for the information to be used only in developing a list for an election or a referendum would no longer be a requirement.
I remember very clearly when Elections Canada started doing the perpetual enumeration system and using the income tax reporting to facilitate that. I remember being promised at that time that this information would only be used for the preparation of a list. By taking this clause out, it is saying to Canadians, “Well, we promised that to get it going, but now that we've got it going, we're going to take it out so we can use the information for other things”.
There have been a lot of comments in the media about the use of information. We just had the Maher Arar inquiry, where information was used about him. It certainly wasn't election information, but it was information that was used in a way that ended up being quite difficult for him.
The people in the homeless population who don't have a lot of power and control over their information might not understand, or they might not be prepared to share their information. That would then prevent them from engaging in the electoral process.