I totally get where you're coming from and agree that consent is extremely important, always. To me it seems that OP is asking for feedback on the agreement and proposed arrangement before he broaches this with his wife. It could be that he would like to present this idea as an option to her to see whether she is interested in participating. Nowhere in the post does he say outright that his wife doesn't/won't engage with his chastity play. He does say she tolerates it, but we just don't know what that means in practice for them.

For OP I would suggest that you communicate with your wife about this type of play without presenting some cut and paste job off the net. It's so impersonal, and from my perspective, I would definitely be uncomfortable and annoyed if my partner sprang any type of 'agreement' on me without discussing it first. Maybe she already knows your fantasises and this would be a-ok for you guys though, I don't know. But if you haven't explicitly talked, then it would be best that you BOTH communicate your desires, thoughts, feelings, and then you can explain why you like this specific idea. If she doesn't like it, so be it, she has every right to say no and it must be respected.

I'd also suggest that if your wife IS interested in this, that you come up with rules together rather than imposing them from some online checklist. This way it's a personal experience that the both of you shape and share and the rules reflect your actual relationship. Think about the awesome bonding moment you could have together, coming up with rules that make sense for YOUR relationship!

Also, I think the clause referring to the 'supervisor' only being able to terminate the agreement is a pretty bad idea. Even though these types of clauses are generally for effect, you could unwittingly put a lot of pressure on your wife to manage your fetish - she might not want ALL the responsibility for this. Make sure you talk about all these types of details beforehand, they are important.