I called the ministry about this last year when everyone was getting all upset about it. What I was told was you CAN catch your own bait still, but you cannot move it inland from where you caught it to use it inland
outside of the proposed BMZ that you live in ie if you catch minnows in Lake Erie (Zone 19), (or buy them from a local bait supplier ie NEM, Rush Creek, or Big Otter Marina as examples) within what is technically, zone 16, you CAN use them at Fanshawe Conservation Area for example without requiring a receipt if you bought them, (although if you can get a receipt where you bought them it's always a good thing just to CYA) and the reason for this is because the rivers and streams of zone 16 empty into several of the great lakes, and you CAN use minnows you caught in Lake Erie, (or bought from a local bait supplier) move them over land to use them in Lake Huron, Detroit, Upper Niagara and St Clair rivers, Lake St. Clair, and Georgian Bay and you CAN use minnows you caught or bought in zone 16 for example in any of the great lakes that zone 16 borders again because they are immediately adjacent to zone 16.
But if you're planning to go outside the primary BMZ that you live in, ie you're planning a trip to Northern Ontario including "cottage country north of Barrie, from anywhere in what they're calling the proposed southern BMZ, which is a very large area, stretching from Cornwalll to Windsor, Tobermory to Pelee Island, Zones, 13,14,16,17,18,19 and 20, you cannot catch or purchase your bait and take it with you to your northern destinations outside of those FMZ's, and vice versa, because those northern areas you are heading too, are outside the proposed new southern BMZ that most if not all of us live in. You'd have to buy it or catch it locally where you're going or within that BMZ and you cannot transport it out of that BMZ when your trip is over, dead or alive.
Now that this apparently is going to happen, I've called the ministry again to get clarification on that, but after listening to the pretty music for almost an hour and being told by the robot they'd be with me shortly, when someone finally did pick up, they didn't know, and transferred me to someone who would know and I had to leave a message. I'm just waiting for them to call me back and once they do, I'll let you know who I spoke with and what they tell me.
But unless it's changed, based on what I was told last year when this was brought up, (again) and as I understand what they released within the link
@Crestliner16 posted, (the document titled "Ontario's Sustainable Bait Management Strategy 2020") ALL of that is covered in section 3. subsections, 3.1 through 3.5. But as I said, I'll get the clarification that what I was told about it last year, and confirm that how I've interpreted what I read is still true. As soon as I know, you will.