A couple of jurisdictions have put in place codes of conduct that incorporate the gamut of obligations, including conflict of interest as well as personal behaviour.
The Commonwealth Parliamentary Association is looking at a variety of different jurisdictions for examples of this, and they have developed draft benchmarks for good governance, specifically looking at codes of conduct.
In those draft benchmarks, they have put the recommendation that every jurisdiction have, for example, rules around declaration of assets and rules around declaration of private interests. They also have in place what they call etiquette standards, and these include behaviour around attendance in the House of Commons, harassment issues, personal conduct, partisan behaviour, and so on.
That particular association has gone some way, and they're just in the process now of consulting on those benchmarks.