I have a question posed by a friend that I thought some of you knowledgable ladies might be able to help me with.

My friend and her XH have shared custody of her two primary-school aged boys. This has been put in place with a court-ordered arrangement. Neither party is particularly amicable to the other, unfortunately.

Long and short of it is, after a change in XH's situation (new full-time job involving interstate travel), it's becoming difficult for him to fulfil his share of the custody arrangement, without needing her to be available to take the boys if he wants to go away at short notice.

If they both would like to change the current custody arrangement, do they both have to go back to their lawyers and redo the whole thing? Or is there a simpler way to change the arrangement if they both agree with what they'd like to do?