(a) Unless otherwise resolved by agreement of the parents under 48-9-201 of this code, the court shall allocate responsibility for making significant life decisions on behalf of the child, including the childs education and health care, to one parent or to both parents jointly, in accordance with the childs best interest, in light of the ability or inability of the parents, based upon the evidence before the court, to work collaboratively and in cooperation with each other in decisionmaking on behalf of the child, and the existence of any criteria as set forth in 48-9-209 of this code.
(1) The level of each parents participation in past decision making on behalf of the child;