13.1 For aircraft in the heavy wake turbulence category the word “Heavy” shall be included immediately after the aircraft call sign in the initial radiotelephony contact between such aircraft and the aerodrome control tower or the approach control office prior to departure or arrival.
Note 1.— Wake turbulence categories are specified in the instructions for completing Item 9 of the flight plan in Appendix 2.
Note 2.— Until flight data processing systems can process designators which will fully delineate MLS capability, radiotelephony contact may be required to convey to ATC the MLS capability of an individual aircraft on a particular flight.
13.2 The appropriate MLS capability designator shall be included, whenever appropriate, in the initial radiotelephony contact between such aircraft and the aerodrome control tower, or the approach control office, prior to departure or arrival.
Note.— Designators for MLS capabilities are specified in the instructions for completing Item 10 of the flight plan in Appendix 2.
14. Position reporting
14.1 Transmission of position reports

14.1.1 On routes defined by designated significant points, position reports shall be made when over, or as soon as possible after passing, each designated compulsory reporting point, except as provided in 14.1.3. Additional reports over other points may be requested by the appropriate air traffic services unit when so required for air traffic services purposes.
14.1.2 On routes not defined by designated significant points, position reports shall be made as soon as possible after the first half hour of flight and at hourly intervals thereafter, except as provided in 14.1.3. Additional reports at shorter intervals of time may be requested by the appropriate air traffic services unit when so required for air traffic services purposes.
14.1.3 Under conditions specified by the appropriate ATS authority, flights may be exempted from the requirement to make position reports at each designated compulsory reporting point or interval. In applying this paragraph, account should be taken of the meteorological requirement for the making and reporting of routine aircraft observations.
Note.— This is intended to apply in cases where adequate flight progress data are available from other sources, e.g. ground radar (see Part VI, 6.4.4), and in other circumstances where the omission of routine reports from selected flights is found to be acceptable.
14.1.4 The position reports required by 14.1.1 and

14.1.2 shall be made to the air traffic services unit serving the airspace in which the aircraft is operated. In addition, when so prescribed by the appropriate ATS authority in aeronaut-
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ical information publications or requested by the appropriate air traffic services unit, the last position report before passing from one flight information region or control area to an adjacent flight information region or control area shall be made to the air traffic services unit serving the airspace about to be entered.
14.1.5 If a position report is not received at the expected time, subsequent control shall not be based on the assumption that the estimated time is accurate. Immediate action shall be taken to obtain the report if it is likely to have any bearing on the control of other aircraft.
14.2 Contents of position reports

14.2.1 The position reports required by 14.1.1 and 14.1.2 shall contain the following elements of information, except that elements (4), (5) and (6) may be omitted from position reports transmitted by radiotelephony, when so prescribed on the basis of regional air navigation agreements:
1) Aircraft identification
2) Position
3) Time
4) Flight level or altitude
　
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