From the Deer Alliance page(same crowd that tried to bring in mandatory hcap).
They have submitted a proposal to the IDMF and the Minister to raise the minimum legal caliber to .24 inches and 100gr. Meaning even a 243 with a 95gr bullet won't cut it.
I've been a critic of people going for the lowest possible legal caliber for years, but this is a step to far. It will not only eliminate those calibers that are "on the edge" in legal terms, but will force people to either use an inappropriately suited round to the their rifle or change up for a larger caliber as the heaviest round available for 243 is not on the "border" of being legal if this proposal is adopted.
As a side note i see the list of calibers they have includes the 223. If they think Swifts and 22-250 are too low why have they got and talk about 223s when they don't come close to making the grade. Also for international shooters, think Americans as some can use a 223 for deer hunting.