Yes that is essentially the arrangement. I agree 100% on her needing to be active in the decision (it's rule #4, actually) to have an extra come to bed with us. It's her body, I'd never coerce her or otherwise to do things she isn't willing to do. When we bring someone to bed, it is the both of us doing it. I can't remember an instance (not that there have been many) where it has been instigated by one side or the other. It's usually mutual, talked about well in advance and each other's rules and boundaries respected.
I agree with you on the second and 3rd paragraphs as well. After some thought and discussion on the matter, I'm pretty sure the issue is closed for now. What I do know is it won't remain closed forever. One of the many things I've learned in our marriage, things are always open to revisit, things are always adjustable to new ideas and nothing is ever dealt with for good.
We talked a bit more this morning before I went to bed. As it turns out she has a great understanding of the rules in place, just a different interpretation of them. She interpreted the combination of rules 1, 3, & 4 meant that if given permission to go to "y" and do "x" then it's not outside the rules. However if you include rule #2 then it doesn't fall within the standard set and in my opinion falls too far outside the rules. She's not wrong, and neither am I. They're different interpretations of the same words.
Side note: Think of the effect similar to that in law. The law is written using a single set of words, the art of practicing law on the other hand is the art of interpreting those words. I actually found it awe inspiring when she told me that upon reflection she see's it as within the rules based on her interpretation. Which is entirely the kind of intelligent discourse I am so very lucky to have.
Ultimately the answer is no. I will not be going, ever. After our talk this morning (see, we really do talk everyday) we both agreed that the risk is not worth the reward. Despite that our old methods are not working adds no weight to the argument that it should be done. It's not the end of the world, one day we'll meet the right person and things will be good. Just because the old methods aren't achieving a specific goal, doesn't mean they aren't working. They're working as intended and keeps undesirables out of our relationship. Neither of us see the need to change the rules, though we agree some tweaking may take place in the near future to clarify some points.
Thank you for your input Reine, I assure you I will remember your words of wisdom.