What trade rules govern cash grain sales at Canadian elevators?

There are no standardized rules for grains and oilseeds delivered to Canadian elevators.  The conditions are contained within the terms of the contract.

Arbitration of disputes is conducted through mutually agreed to arbitration or through the Canadian Federal or Provincial court system.

Sellers of U.S. grain wishing to deliver to a Canadian buyer are advised to obtain a copy of the buyer’s contract prior to entering into any commercial transaction.

In Canada a verbal commitment is considered a binding legal contract.