 There is a still further question of how we should understand the scope of the best-interests principle. The BIP has operated in at least two important domains (Kopelman 1997a). One is in the medical context when determining which option should be selected for an ill or diseased child. The second is in custody disputes following the separation or divorce of the child’s guardians. Here, where there is unresolved argument as to who should now raise the child, the court must decide. However, beyond these two specified domains, the BIP has also been given broader application in respect of all policies and laws affecting children. This is certainly what the UN Convention Article 3.1 appears to require.