The Bell Principals are thought to be the first set of conduct guidelines created by a political organisation for its affiliated candidates and representatives. They are under constant review.
The Independent Network requires all endorsed candidates to agree to these principles. The Principles are used by the Independent Network to endorse and influence the conduct - but not the policies - of its affiliated candidates.
The endorsement process helps the electorate to know that a group of people have looked at endorsed candidates and judged them to be good quality representatives.