A “custody agreement” – now properly referred to as a “parenting agreement” – will need to primarily promote what is in the child’s best interests (the paramount consideration under the Act).  Generally speaking, a parenting agreement will contain provisions regarding:
who has parental responsibility for the child (in many cases this will be both parents);
with which party the child will primarily reside or “live” and when he/she will spend time with the “non-resident” parent.  Alternatively, if a child is to spend equal time with both parents, the agreement needs to clearly set out how this will occur (e.g., “week-about”);
the time the child spends with each parent during school holiday periods;
the time the child spends with each parent on special occasions such as his/her (or his/her parents’ or siblings’) birthdays, Easter, and Christmas;
where and how “handovers” will occur;
the frequency of telephone or electronic communication (increasingly, FaceTime or Messenger) with the child when he/she is in the other parent’s care;
mutual requirements to keep the other informed and notified of any health or medical appointments/illnesses/diagnoses/information and treatment pertaining to the child whilst in each parent’s care;
written signed Authorities enabling each parent to liaise directly with, or attend, the child’s school as appropriate/necessary, and for the dissemination of information from the school to each parent individually; and
provisions regarding each party’s proposed international, interstate, and intra-state travel with the child (e.g., appropriate written notice, provision of consent, accommodation arrangements, scheduled itinerary, and communication whilst away).