Policital campaigns are exempt from CASL.
There is no way the NDP is using a list from Elections Alberta to make these texts, I'm sure they rented a list.
Edit: Here's the news story from last year:
In an emailed statement from the NDP Caucus, caucus chair and Edmonton-Manning MLA Heather Sweet said the texts are sent using a program that “generates random mobile numbers to text.” She said when a person replies, they’re engaging with a volunteer on the other end.
“Like door-knocking, attending events, etc. this is just another method of outreach,” Mariampillai said.
https://globalnews.ca/news/4097537/a...text-messages/