What is required for a parenting order to be applied for?

A parenting order can be applied for by one or more parents, which means that just one parent can initiate the application process without requiring the other parent's involvement or consent. This reflects the legal recognition that a parent has the right to seek arrangements regarding the care and control of their children, irrespective of the other parent's position.

While the other options present possible scenarios regarding parenting orders, they impose unnecessary limitations. The idea that only the custodial parent can apply narrows the scope unduly, as non-custodial parents also have rights and responsibilities. The notion that both parents must submit an application together is not a requirement, as one parent can proceed independently. Lastly, the stipulation that a lawyer must be present for at least one parent is not a legal prerequisite; parents can represent themselves in these matters. Hence, the requirement is simply for one or more parents to file for the order, which is encapsulated in the selected answer.