Figure IV-3 (see 8.3.3)
6.1 Information regarding significant changes in the meteorological conditions in the take-off or climb-out area, obtained by the unit providing approach control service after a departing aircraft has established communication with such unit, shall be transmitted to the aircraft without delay, except when it is known that the aircraft already has received the information.
Note.— Significant changes in this context include those relating to surface wind direction or speed, visibility, runway visual range, or air temperature (for turbine engined aircraft), and the occurrence of thunderstorm or cumulonimbus, moderate or severe turbulence, wind shear, hail, moderate or severe icing, severe squall line, freezing precipitation, severe mountain waves, sand storm, dust storm, blowing snow, tornado or waterspout.
6.2 Information regarding changes in the operational status of visual or non-visual aids essential for take-off and climb shall be transmitted without delay to a departing aircraft, except when it is known that the aircraft already has received the information.
6.3 Information regarding essential local traffic known to the controller shall be transmitted to departing aircraft without delay.
Note 1.— Essential local traffic in this context consists of any aircraft vehicle or personnel on or near the runway to be used or traffic in the take-off and climb-out area, which may constitute a collision hazard to the departing aircraft.
Note 2.— See also Part III, Section 14 and Part VI, 8.2.
ARRIVING AIRCRAFT
7. General procedures for arriving aircraft

7.1 When it becomes evident that delays in holding will be encountered by arriving aircraft, the operator or a designated representative shall be notified and kept currently informed of any changes in such expected delays, in order that diversionary action may be planned as far in advance as possible.
7.2 Arriving aircraft may be required to report when leaving or passing a reporting point, or when starting procedure turn or base turn, or to provide other information required by the controller to expedite departing aircraft.
7.3 An IFR flight shall not be cleared for an 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 the aerodrome is and can be maintained in sight; or
c)  the aircraft is conducting a visual approach; or
d)  the aircraft's position has been positively determined by the use of radar.
8. Clearance to descend subject to maintaining own separation while in visual meteorological conditions

8.1 When requested by the aircraft and if so prescribed by the appropriate ATS authority an arriving aircraft may be cleared to descend subject to maintaining own separation and remaining in visual meteorological conditions if reports indicate that this is possible.
Note.— See also Part III, Section 13.
9. Visual approach

9.1 An IFR flight may be cleared to execute a visual approach provided that the pilot can maintain visual reference to the terrain and:
a)  the reported ceiling is at or above the approved initial approach level for the aircraft so cleared; or
b)  the pilot reports at the initial approach level or at any time during the instrument approach procedure that the meteorological conditions are such that with reasonable assurance a visual approach and landing can be completed.

9.2 Separation shall be provided between an aircraft cleared to execute a visual approach and other arriving and departing aircraft.
9.3 For successive visual approaches, radar or non-radar separation shall be maintained until the pilot of a succeeding aircraft reports having the preceding aircraft in sight.  The aircraft shall be instructed to follow and maintain separation from the preceding aircraft.  Transfer of communications should be effected at such a point or time that clearance to land or alternative instructions can be issued to the aircraft in a timely manner.
　
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