What are the other basic principles behind child custody (parenting) arrangements?

As a starting point, Australian family law says that there are three basic principles when making parenting arrangements:

1.The parents should share the parenting responsibilities equally
2.The parents should try and make parenting arrangements without going to court
3.The parents are both responsible for the child until the child is 18 years old

However, many factors may influence whether these principles can be applied in particular circumstances, for example, the child’s safety, whether there’s family violence and what’s in the child’s best interests.