If by joint custody (which does not exist as such in WA) you mean you have a 50/50 parenting plan, the law is the same as with any parenting plan, a parent gets the time allocated to him/her in the parenting plan and that's it. If the other parent withholds the child during that time, in the absence of a subsequent court order, the parent who did not get the time can call the police and get the children and/or file a motion for contempt or a motion to compel.
Answered on Oct 31st, 2013 at 2:26 PM