The Family Law Act states that parents have shared parental responsibility unless there are good reasons for giving one parent primary or sole responsibility.
These days, family law prefers the term parenting arrangements to the term child custody.
Often, shared parental responsibility is the starting point for parenting arrangements. That is, whether both parents should have equal shared parenting responsibility. A court will consider the best interests of the children, whether there has been any abuse or violence, and the benefit to the child in having a meaningful relationship with both parents.