my ex-husband is moving to texas with our children 13 and 15 for a job promotion. We have legal joint custody but he is custodial parent. what are m

In most cases, Oregon courts will not allow a parent to move out-of-state with the children so long as the other parent is actively involved in the children's lives.  Since you have joint custody, you can always move for a modification and seek to have sole custody to keep the children here.  If he moves without getting approval from the court for the move, you can file a motion to force the return of the children.  He will be in violation of the parenting plan.