when it becomes evidence that delays in holding will be encountered by arriving aircraft, the operator or his designated representative shall be notified and kept currently informed of any changes in such expected delays, in order to that diversionary action may be planned as far as in advance as possible.



An IFR flight shall not be cleared for initial approach below the appropriate minimum altitude as specified by the state concerned nor to descend below that altitude unless :


  a) the pilot has reported passing an appropriate point defined by a radio aid; or
  b) the pilot reports that he has and can maintain the aerodrome in sight;nor
  c) the aircraft is conducting a visual approach; or
  d) the aircraft's position has been positively determined by the use of radar.