(1) The notice of appeal must be filed at the appropriate court office —
(a) in the case of an interlocutory appeal where leave is not required, within 21 days of the date the decision appealed against was made;
(b) in an interlocutory appeal where leave is required, within 21 days of the date when such leave was granted; or
(c) in the case of any other appeal, within 42 days of the date when judgment is delivered or the order is made, whichever is earlier.
(2) The court below making the interlocutory decision in respect of which a party intends to appeal may extend any of the time limits in this rule on application made orally at the time the decision is made.
(3) The court may extend any of the time limits in this rule on an application made under Part 11 and any such application may be determined without a hearing.