Yeah. Calling something a sale at a price that’s not actually discounted under the regular price (with some caveats on how long it needs to be at said regular price), then yeah it’s a violation of the act. Basically false advertising.
Bumping up the regular price to cover what you’d have otherwise saved on tax is dickish but not against any regulations AFAIK
I used to think so but frankly the infection seems to have spread pretty far up here.