Hmmm... no back talk... my doesn't talk so I sneak by on that one!
That could go under respect but it sounds like there may be a need for something stronger/more directly aimed at back talk.
what kinds of things usually trigger back talk? I think I would try to be as specific as possible:
this is a 0 excuse home
we help when asked
we respect ourselves by taking responsibility for our actions

IMO they do need to be taught a respectful way to disagree or question. I say this because sometimes kids who know better than to back talk to an adult can get hurt when an adult tells them to do something wrong or harms them. There are however respectful ways to do that.

I may be able to come up with something better with some examples.

I have also found it helpful when I have been working on rules for my son to not be afraid to make a really long list at first. Then take a break and come back to decide what are the most important ones and to see if there is a way to put several rules together into one. We don't want to hit our kids with "101 things you can't do in this house" but sometimes, with the right wording you can fit what you are truly trying to get into 10 rules... Seeing everything together helps us sort for patterns, be more specific and condense. The kids don't have to know it is really 101 that magically looks like 10