For what it’s worth, I think the Code of Conduct is a bit much to have as well as the standing orders, and you run the risk of losing everything because of perceived overkill.
I also share other Flatchatters concern about the legal standing of the code of conduct. You can’t force people to sign it so, or prevent them being elected if they don’t, so why would they?
My advice would be to get your standing orders through and then have an extended discussion with all owners before the next AGM about what form a code of conduct might take before presenting it to next year’s AGM.