In US Territorial Waters (of Lake Ontario) you can't have a mechanism for overboard discharge (mascerator/"Y" valve, etc.) connected to a holding tank unless it has been sealed or permanently disabled; and you can't be directly plumbed for pass-through to a through-hull.
In Ontario (CAN) waters any toilet has to have a permanent connection for discharge only through a deck fitting. So, you can have a Porta-Potti IF it is permanent and is plumbed through the hull/deck to be pumped out. I don't know if that is nation-wide for Canada.
I think that's the case, anyway.
A wood bucket is only illegal if you toss the contents over the side. Any Great Lake that touches NY is a No Discharge Zone already, I believe. We never had problems within the US waters of Lake Ontario for having a Porta-Potti aboard. But then we were never boarded. On our 34 we were only equipped with a holding tank and the macerator pump was in a storage locker (new & unused and not connected with any hoses). We only kept it in case a future owner wanted to go to salt-water.
Section 312 of the Clean Water Act sets out the principal framework for domestically regulating sewage discharges from vessels, and is implemented jointly by the U.S. Environmental Protection Agency and the U.S. Coast Guard. “Sewage” is defined under the Clean Water Act as “human body wastes and the waste from toilets and other receptacles intended to receive or retain body wastes”, and includes graywater discharges from commercial vessels (as defined at 33 U.S.C. 1322(a)(10)) operating on the Great Lakes. Under section 312 of the Clean Water Act, vessel sewage is generally controlled by regulating the equipment that treats or holds the sewage (marine sanitation devices), and through the establishment of areas in which the discharge of sewage from vessels is not allowed (no discharge zones).
So even that wood bucket is a violation of the Clean Water Act if you dump it.
Whether balancing on the rail is covered will be between you and the nice people in the Coast Guard vessel along side you at the time.
