Agree with Bn – if you have a by-law specific to garage door openers than that would be an item you could exclude from the Common Property Memorandum as not being necessary.
In any case, I wouldn’t take anything you get from Fair Trading as gospel. They don’t get to make the law, whatever they might think.
Finally, larney, I went looking for links to the “Common property memorandum” using our search function and it took me about a second to find this link. So, you’re probably right … you did something wrong.