(1) This rule applies where some, but not all, of the persons entitled to share in a fund are ascertained and there is likely to be delay in determining the existence or entitlement of the other persons.
(2) The court may order immediate payment of their shares to the persons who have been ascertained.
(3) The court need not reserve any part of those shares for the purpose of meeting any subsequent costs of determining the existence or entitlement of the other persons.