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relevant provisions of the ICAO communication procedures.
5.3.2.1 The AFS shall, whenever practicable, be employed
for NOTAM distribution.
5.3.2.2 When a NOTAM exchanged as specified in 5.3.4
is sent by means other than the AFS, a six-digit date-time
group indicating the date and time of NOTAM origination, and
the identification of the originator shall be used, preceding
the text.
5.3.3 The originating State shall select the NOTAM that
are to be given international distribution.
5.3.3.1 Recommendation.- Selective distribution lists
should be used when practicable.
Note.- These lists are intended to obviate superjhous
distribution of information. Guidance material relating to this
is contained in the Aeronautical Information Services Manual
(Doc 8126).
5.3.4 International exchange of NOTAM shall take place
only as mutually agreed between the international NOTAM
offices concerned. The international exchange of ASHTAM
(see 5.2.4), andNOTAM where States continue to use
NOTAM for distribution of information on volcanic activity,
shall include volcanic ash advisory centres, and shall take
account of the requirements of long-range operations.
Note.- Arrangements may be made for direct exchange of
SNO WTAM (see Appendix 2) between aemdromes/heliports.
5.3.4.1 These exchanges of NOTAM between international
NOTAM offices shall, as far as practicable, be limited to the
requirements of the receiving States concerned by means of
separate series providing for at least international and domestic
flights.
5.3.4.2 A predetermined distribution system for NOTAM
transmitted on the AFS in accordance with Appendix 5 shall
be used whenever possible, subject to the requirements of
5.3.4.
CHAPTER 6. AERONAUTICAL INFORMATION
REGULATION AND CONTROL (AIRAC)
6.1 General specifications
6.1.1 Information concerning the circumstances listed in
Appendix 4, Part 1, shall be distributed under the regulated
system (AIRAC), i.e. basing establishment, withdrawal or
significant changes upon a series of common effective dates at
intervals of 28 days, including 29 January 1998. The information
notified therein shall not be changed further for at least
another 28 days after the effective date, unless the circumstance
notified is of a temporary nature and would not persist
for the full period.
Note.- Guidance material on the procedures applicable to
the AIRACsystem is contained in the Aeronautical Information
Services Manual (Doc 8126).
6.1.2 Recommendation.- The regulated system (AIRAC)
should also be used for the provision of information relating to
the establishment and withdrawal oj; and premeditated signifcant
changes in, the circumstances listed in Appendix 4, Part 2.
6.1.3 When information has not been submitted by the
AIRAC date, a NIL notification shall be originated and
distributed by NOTAM or other suitable means, not later than
one cycle before the AIRAC effective date concerned.
6.1.4 Implementation dates other than AIRAC effective
dates shall not be used for pre-planned operationally significant
changes requiring cartographic work andlor for updating of
navigation databases.
6.1.5 Recommendation.- The use of the date in the
AIRAC cycle which occurs between 21 December and
17 January inclusive should be avoided as an effective date for
the introduction of significant changes under the AIRAC system.
6.2 Provision of information in
paper copy form
6.2.1 In all instances, information provided under the
AIRAC system shall be published in paper copy form and
shall be distributed by the AIS unit at least 42 days in advance
of the effective date with the objective of reaching recipients
at least 28 days in advance of the effective date.
6.2.2 Recommendation.- Whenever major changes are
planned and where advance notice is desirable and practicable,
a publication date of at least 56 days in advance of the effective
date should be used.
6.3 Provision of information in
electronic form
6.3.1 States that have established an aeronautical database
shall, when updating its contents concerning the circumstances
listed in Appendix 4, Part 1, ensure that the effective dates of
data coincide with the established AIRAC effective dates used
for the provision of information in paper copy form.
6.3.2 Information provided in electronic form, concerning
the circumstances listed in Appendix 4, Part 1, shall be
disttibuted/made available by the AIS unit so as to reach
recipients at least 28 days in advance of the AIRAC effective
date.
6.3.3 Recommendation, Whenever major changes are
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