It seems that Gene nailed it. At least from the safety equipment and USCG viewpoint.
Not sure how some self important state guy might see this.
§ 24.15-5 Canadian pleasure craft temporarily using navigable waters of the United States.
Uninspected Canadian pleasure craft (uninspected vessels) temporarily using navigable waters of the United States may carry in lieu of the equipment required by this subchapter, the equipment as required by the laws of the Dominion of Canada and the regulations of the Department of Transport, Ottawa, Canada.
[CGFR 65-50, 30 FR 16650, Dec. 30, 1965, as amended by CGD 95-028, 62 FR 51196, Sept. 30, 1997]
There is also a corresponding Canadian Law for US Pleasure Craft visiting Canada
Safety Equipment Requirements
Foreign pleasure craft (pleasure craft that are licensed or registered in a country other than Canada) need to comply with equipment requirements of the country in which the vessel is usually kept.
If you are not a resident of Canada and are using a pleasure craft licensed or registered in Canada, all of the required safety equipment must meet Canadian safety requirements. However, you may opt to bring your own PFD for your own personal use.
For more information, consult the Small Vessel Regulations.