1. When a court is making a determination regarding the legal custody of a child, there is a presumption, affecting the burden of proof, that joint legal custody would be in the best interest of a minor child if:
(a) The parents have agreed to an award of joint legal custody or so agree in open court at a hearing for the purpose of determining the legal custody of the minor child; or
(b) A parent has demonstrated, or has attempted to demonstrate but has had his or her efforts frustrated by the other parent, an intent to establish a meaningful relationship with the minor child.
2. The court may award joint legal custody without awarding joint physical custody.