As John noted, "E" really doesn't apply unless you say you'll follow those rules and the commercial customer agrees. What you need is an agreement to replace what Reg. E does on the consumer side. But following the principle of "he who has the gold, makes the rules" you can place more liability and requirements on the commercial customer, so long as you are within your agreement with Visa.
My opinions are not necessarily my employers.
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell