Article VI. Choice of Observation Aircraft, General Provisions for the Conduct of Observation Flights, and Requirements for Mission Planning

1. Observation flights shall be conducted using observation aircraft that have been designated by a State Party pursuant to Article V. Unless the observed Party exercises its right to provide an observation aircraft that it has itself designated, the observing Party shall have the right to provide the observation aircraft. In the event that the observing Party provides the observation aircraft, it shall have the right to provide an aircraft that it has itself designated or an aircraft designated by another State Party. In the event that the observed Party provides the observation aircraft, the observing Party shall have the right to be provided with an aircraft capable of achieving a minimum unrefuelled range, including the necessary fuel reserves, equivalent to one-half of the flight distance, as notified in accordance with paragraph 5, subparagraph(G) of this Section.

2. Each State Party shall have the right, pursuant to paragraph 1 of this Section, to use an observation aircraft designated by another State Party for observation flights. Arrangements for the use of such aircraft shall be worked out by the States Parties involved to allow for active participation in the Open Skies regime.

3. States Parties having the right to conduct observation flights may co-ordinate their plans for conducting observation flights in accordance with Annex H to this Treaty. No State Party shall be obliged to accept more than one observation flight at any one time during the 96-hour period specified in paragraph 9 of this Section, unless that State Party has requested a demonstration flight pursuant to Annex F to this Treaty. In that case, the observed Party shall be obliged to accept an overlap for the observation flights of up to 24 hours. After having been notified of the results of the co-ordination of plans to conduct observation flights, each State Party over whose territory observation flights are to be conducted shall inform other States Parties, in accordance with the provisions of Annex H, whether it will exercise, with regard to each specific observation flight, its right to provide its own observation aircraft.

4. No later than 90 days after signature of this Treaty, each State Party shall provide notification to all other States Parties:

1. of the standing diplomatic clearance number for Open Skies observation flights, flights of transport aircraft and transit flights; and

2. of which language or languages of the Open Skies Consultative Commission specified in Annex L, Section I, paragraph 7 to this Treaty shall be used by personnel for all activities associated with the conduct of observation flights over its territory, and for completing the mission plan and mission report, unless the language to be used is the one recommended in Annex 10 to the Convention on International Civil Aviation, Volume II, paragraph 5.2.1.1.2.

5. The observing Party shall notify the observed Party of its intention to conduct an observation flight, no less than 72 hours prior to the estimated time of arrival of the observing Party at the point of entry of the observed Party. States Parties providing such notifications shall make every effort to avoid using the minimum pre-notification period over weekends. Such notification shall include:

1. the desired point of entry and, if applicable, Open Skies airfield where the observation flight shall commence;

2. the date and estimated time of arrival of the observing Party at the point of entry and the date and estimated time of departure for the flight from the point of entry to the Open Skies airfield, if applicable, indicating specific accommodation needs;

3. the location, specified in Annex E, Appendix 1, where the conduct of the pre-flight inspection is desired and the date and start time of such pre-flight inspection in accordance with the provisions of Annex F;

4. the mode of transport and, if applicable, type and model of the transport aircraft used to travel to the point of entry in the event that the observation aircraft used for the observation flight is provided by the observed Party;

5. the diplomatic clearance number for the observation flight or for the flight of the transport aircraft used to bring the personnel in and out of the territory of the observed Party to conduct an observation flight;

6. the identification of the observation aircraft, as specified in Annex C;

7. the approximate observation flight distance; and

8. the names of the personnel, their gender, date and place of birth, passport number and issuing State Party, and their function.

6. The observed Party that is notified in accordance with paragraph 5 of this Section shall acknowledge receipt of the notification within 24 hours. In the event that the observed Party exercises its right to provide the observation aircraft, the acknowledgement shall include the information about the observation aircraft specified in paragraph 5, subparagraph (F) of this Section. The observing Party shall be permitted to arrive at the point of entry at the estimated time of arrival as notified in accordance with paragraph 5 of this Section. The estimated time of departure for the flight from the point of entry to the Open Skies airfield where the observation flight shall commence and the location, the date and the start time of the pre-flight inspection shall be subject to confirmation by the observed Party.

7. Personnel of the observing Party may include personnel designated pursuant to Article XIII by other States Parties.

8. The observing Party, when notifying the observed Party in accordance with paragraph 5 of this Section, shall simultaneously notify all other States Parties of its intention to conduct the observation flight.

9. The period from the estimated time of arrival at the point of entry until completion of the observation flight shall not exceed 96 hours, unless otherwise agreed. In the event that the observed Party requests a demonstration flight pursuant to Annex F to the Treaty, it shall extend the 96-hour period pursuant to Annex F, Section III, paragraph 4, if additional time is required by the observing Party for the unrestricted execution of the mission plan.

10. Upon arrival of the observation aircraft at the point of entry, the observed Party shall inspect the covers for sensor apertures or other devices that inhibit the operation of sensors to confirm that they are in their proper position pursuant to Annex E, unless otherwise agreed by all States Parties involved.

11. In the event that the observation aircraft is provided by the observing Party, upon the arrival of the observation aircraft at the point of entry or at the Open Skies airfield where the observation flight commences, the observed Party shall have the right to carry out the pre-flight inspection pursuant to Annex F, Section I. In the event that, in accordance with paragraph 1 of this Section, an observation aircraft is provided by the observed Party, the observing Party shall have the right to carry out the pre-flight inspection of sensors pursuant to Annex F, Section II. Unless otherwise agreed, such inspections shall terminate no less than four hours prior to the scheduled commencement of the observation flight set forth in the flight plan.

12. The observing Party shall ensure that its flight crew includes at least one individual who has the necessary linguistic ability to communicate freely with the personnel of the observed Party and its air traffic control authorities in the language or languages notified by the observed Party in accordance with paragraph 4 of this Section.

13. The observed Party shall provide the flight crew, upon its arrival at the point of entry or at the Open Skies airfield where the observation flight commences, with the most recent weather forecast and air navigation information and information on flight safety, including Notices to Airmen. Updates of such information shall be provided as requested. Instrument procedures, and information about alternate airfields along the flight route, shall be provided upon approval of the mission plan in accordance with the requirements of Section II of this Article.

14. While conducting observation flights pursuant to this Treaty, all observation aircraft shall be operated in accordance with the provisions of this Treaty and in accordance with the approved flight plan. Without prejudice to the provisions of Section II, paragraph 2 of this Article, observation flights shall also be conducted in compliance with:

1. published ICAO standards and recommended practices; and

2. published national air traffic control rules, procedures and guidelines on flight safety of the State Party whose territory is being overflown.

15. Observation flights shall take priority over any regular air traffic. The observed Party shall ensure that its air traffic control authorities facilitate the conduct of observation flights in accordance with this Treaty.

16. On board the aircraft the pilot-in-command shall be the sole authority for the safe conduct of the flight and shall be responsible for the execution of the flight plan.

17. The observed Party shall provide:

1. a calibration target suitable for confirming the capability of sensors in accordance with the procedures set forth in Annex D, Section III to this Treaty, to be overflown during the demonstration flight or the observation flight upon the request of either Party, for each sensor that is to be used during the observation flight. The calibration target shall be located in the vicinity of the airfield at which the pre-flight inspection is conducted pursuant to Annex F to this Treaty;

2. customary commercial aircraft fuelling and servicing for the observation aircraft or transport aircraft at the point of entry, at the Open Skies airfield, at any refuelling airfield, and at the point of exit specified in the flight plan, according to the specifications that are published about the designated airfield;

3. meals and the use of accommodation for the personnel of the observing Party; and

4. upon the request of the observing Party, further services, as may be agreed upon between the observing and observed Parties, to facilitate the conduct of the observation flight.

18. All costs involved in the conduct of the observation flight, including the costs of the recording media and the processing of the data collected by sensors, shall be reimbursed in accordance with Annex L, Section I, paragraph 9 to this Treaty.

19. Prior to the departure of the observation aircraft from the point of exit, the observed Party shall confirm that the covers for sensor apertures or other devices that inhibit the operation of sensors are in their proper position pursuant to Annex E to this Treaty.

20. Unless otherwise agreed, the observing Party shall depart from the point of exit no later than 24 hours following completion of the observation flight, unless weather conditions or the airworthiness of the observation aircraft or transport aircraft do not permit, in which case the flight shall commence as soon as practicable.

21. The observing Party shall compile a mission report of the observation flight using the appropriate format developed by the Open Skies Consultative Commission. The mission report shall contain pertinent data on the date and time of the observation flight, its route and profile, weather conditions, time and eriod for each sensor, the approximate amount of data collected by sensors, and the result of inspection of covers for sensor apertures or other devices that inhibit the operation of sensors in accordance with Article VII and Annex E. The mission report shall be signed by the observing and observed Parties at the point of exit and shall be provided by the observing Party to all other States Parties within seven days after departure of the observing Party from the point of exit.

SECTION II. REQUIREMENTS FOR MISSION PLANNING

1. Unless otherwise agreed, the observing Party shall, after arrival at the Open Skies airfield, submit to the observed Party a mission plan for the proposed observation flight that meets the requirements of paragraphs 2 and 4 of this Section.

2. The mission plan may provide for an observation flight that allows for the observation of any point on the entire territory of the observed Party, including areas designated by the observed Party as hazardous airspace in the source specified in Annex I. The flight path of an observation aircraft shall not be closer than, but shall be allowed up to, ten kilometres from the border with an adjacent State that is not a State Party.

3. The mission plan may provide that the Open Skies airfield where the observation flight terminates, as well as the point of exit, may be different from the Open Skies airfield where the observation flight commences or the point of entry. The mission plan shall specify, if applicable, the commencement time of the observation flight, the desired time and place of planned refuelling stops or rest periods, and the time of continuation of the observation flight after a refuelling stop or rest period within the 96-hour period specified in Section I, paragraph 9 of this Article.

4. The mission plan shall include all information necessary to file the flight plan and shall provide that:

1. the observation flight does not exceed the relevant maximum flight distance as set forth in Annex A, Section I;

2. the route and profile of the observation flight satisfies observation flight safety conditions in conformity with ICAO standards and recommended practices, taking into account existing differences in national flight rules, without prejudice to the provisions of paragraph 2 of this Section;

3. the mission plan takes into account information on hazardous airspace, as provided in accordance with Annex I;

4. the height above ground level of the observation aircraft does not permit the observing Party to exceed the limitation on ground resolution for each sensor, as set forth in Article IV, paragraph 2;

5. the estimated time of commencement of the observation flight shall be no less than 24 hours after the submission of the mission plan, unless otherwise agreed;

6. the observation aircraft flies a direct route between the co-ordinates or navigation fixes designated in the mission plan in the declared sequence; and

7. the flight path does not intersect at the same point more than once, unless otherwise agreed, and the observation aircraft does not circle around a single point, unless otherwise agreed. The provisions of this subparagraph do not apply for the purposes of taking off, flying over calibration targets, or landing by the observation aircraft.

5. In the event that the mission plan filed by the observing Party provides for flights through hazardous airspace, the observed Party shall:

1. specify the hazard to the observation aircraft;

2. facilitate the conduct of the observation flight by co-ordination or suppression of the activity specified pursuant to subparagraph (A) of this paragraph; or

3. propose an alternative flight altitude, route, or time.

6. No later than four hours after submission of the mission plan, the observed Party shall accept the mission plan or propose changes to it in accordance with Article VIII, Section I, paragraph 4 and paragraph 5 of this Section. Such changes shall not preclude observation of any point on the entire territory of the observed Party, including areas designated by the observed Party as hazardous airspace in the source specified in Annex I to this Treaty. Upon agreement, the mission plan shall be signed by the observing and observed Parties. In the event that the Parties do not reach agreement on the mission plan within eight hours of the submission of the original mission plan, the observing Party shall have the right to decline to conduct the observation flight in accordance with the provisions of Article VIII of this Treaty.

7. If the planned route of the observation flight approaches the border of other States Parties or other States, the observed Party may notify that State or those States of the estimated route, date and time of the observation flight.

8. On the basis of the agreed mission plan the State Party providing the observation aircraft shall, in co-ordination with the other State Party, file the flight plan immediately, which shall have the content specified in Annex 2 to the Convention on International Civil Aviation and shall be in the format specified by ICAO Document No. 4444-RAC/501/12, "Rules of the Air and Air Traffic Services", as revised or amended.

SECTION III. SPECIAL PROVISIONS

1. In the event that the observation aircraft is provided by the observing Party, the observed Party shall have the right to have on board the observation aircraft two flight monitors and one interpreter, in addition to one flight monitor for each sensor control station on board the observation aircraft, unless otherwise agreed. Flight monitors and interpreters shall have the rights and obligations specified in Annex G to this Treaty.

2. Notwithstanding paragraph 1 of this Section, in the event that an observing Party uses an observation aircraft which has a maximum take-off gross weight of no more than 35,000 kilograms for an observation flight distance of no more than 1,500 kilometres as notified in accordance with Section I, paragraph 5, subparagraph (G) of this Article, it shall be obliged to accept only two flight monitors and one interpreter on board the observation aircraft, unless otherwise agreed.

3. In the event that the observation aircraft is provided by the observed Party, the observed Party shall permit the personnel of the observing Party to travel to the point of entry of the observed Party in the most expeditious manner. The personnel of the observing Party may elect to travel to the point of entry using ground, sea, or air transportation, including transportation by an aircraft owned by any State Party. Procedures regarding such travel are set forth in Annex E to this Treaty.

4. In the event that the observation aircraft is provided by the observed Party, the observing Party shall have the right to have on board the observation aircraft two flight representatives and one interpreter, in addition to one flight representative for each sensor control station on the aircraft, unless otherwise agreed. Flight representatives and interpreters shall have the rights and obligations set forth in Annex G to this Treaty.