Thank you Jason for once and again going above and beyond and providing the cole. I do understand what you mean, and I still don't like NULLs in any case, but I thought I would give it a go. Plus, I like using my tools whenever I can!
What about the error issue where the Rule name is enclosed in the " markup and not the actual quote symbol?
And lastly, I did try using a default database value as a comparison for the rule in various combinations without success, but I will post a new thread on this if I need to.