Section 466 - Effect of granting of support in action for divorce, separation or annulment(a) The supreme court may provide in an order or decree granting temporary or permanent support or maintenance in an action for divorce, separation or annulment that only the family court may entertain an application to enforce or, upon a showing to the family court that there has been a subsequent change of circumstance and that modification is required, to modify such order or decree. If the supreme court so provides, the family court shall entertain such an application and any disposition by the family court of the application is an order of the family court appealable only under article eleven of this act.(b) The supreme court may provide in an order or decree granting alimony, maintenance or support in an action for divorce, separation or annulment that the order or decree may be enforced or modified only in the supreme court. If the supreme court so provides, the family court may not entertain an application to enforce or modify an order or decree of the supreme court involving the parties to the action.(c) If the supreme court enters an order or decree granting alimony, maintenance or support in an action for divorce, separation or annulment and if the supreme court does not exercise the authority given under subdivision (a) or (b) of this section; or if a court of competent jurisdiction not of the state of New York shall enter an order or decree granting alimony, maintenance or support in any such action, the family court may(i) entertain an application to enforce the order or decree granting alimony or maintenance, or(ii) entertain an application to modify the order or decree granting alimony or maintenance on the ground that there has been a subsequent change of circumstances and that modification is required.N.Y. Family Court Law § 466