BOC MEMORANDUM ORDER NO. 17-95 NEW REGISTRY NUMBERING SCHEME June 23, 1995

1.1 To provide a scheme to be adopted by all airlines for the pre-generation of registry numbers;

1.2 To readily identify to which airline a registry number belongs, for control purposes;

1.3 To make registry numbers available, in advance, to all BOC units concerned, for their immediate use.

II.
Administrative Provisions

Upon effectivity of this Order, all airlines shall henceforth be responsible for generating their own registry numbers accordingly:

2.1 Numbering Convention:

Registry numbers shall be alphanumeric, consisting of three (3) alphabetic and four (4) numeric characters. The alphabetic characters shall be the Airline Prefix Code as listed for the different airlines identified in Annex "A". All airlines currently using two (2) alphabetic prefix codes shall add "A" as the third letter until such time as IATA will issue their new prefix codes. The numerals shall be the sequence of aircraft arrivals per the regular schedule of each airline, per year;

The numerical suffix of zeroes shall be incremented by one for every scheduled arrival of each particular aircraft. For example, the registry numbers for the first, second, and third scheduled arrivals for Cathay Pacific Airways shall be CXA0001, CXA0002, and CXA0003, while for Philippine Airlines, it shall be PRA0001, PRA0002, and PRA0003, respectively; and so on for each airline on the list;

2.2 For unscheduled or special flight arrivals, the same Prefix Codes shall apply. However, the numeric portion of the registry shall start with the digit "9", to be followed by three (3) zeroes, to be incremented by one for every special or unscheduled flight arrival within a given year. Hence, the first, second, and third special flight arrivals of PAL for any given year, shall be numbered PRA9001, PRA9002, and PRA9003, respectively, and so on for every other airline.

III.
Operational Provisions

3.1 The numerical sequencing of all registry numbers shall be reset on the first day of January of each succeeding year;

3.2 Two weeks before the start of every quarter, each airline shall pre-generate the registry numbers for all of their scheduled flight arrivals for that quarter. A copy of the pre-generated list shall be immediately submitted to the Aircraft Operations Division (AOD) and the Data Monitoring Division (DMD). The pre-generated registry numbers shall be adopted for use by all concerned units for their official purposes. The registry numbers shall be unique to each flight regardless of actual arrival (e.g. delayed flights). No modifications/adjustments in the registry numbers shall be made by any office. An appropriate notation/communication shall be made in cases of flight cancellations;

3.3 Registry numbers of unscheduled/special flights shall be generated and submitted, as provided above, at the earliest possible time immediately after any airline shall have confirmed the ETA of any such flights;

3.4 AOD shall prepare a daily report of flight arrivals indicating therein the actual date and time of arrivals. Flight and Registry Numbers, copy furnished DMD. It shall also be responsible for generating registry numbers for flight arrivals of airlines not listed in Annex "A", for which the alphabetic Prefix Code shall be "AOD";

3.5 All registry numbers must likewise be affixed on all pertinent documents required for submission to the Bureau.

IV.
Modifying Clause

All existing Orders and Issuances on coding and/or numbering scheme in the issuance and assignment of registry numbers that are contradictory or inconsistent with the provisions of this Order are hereby deemed revoked, superseded, or amended accordingly.

V.
Effectivity

This order shall take effect 01 July 1995 and shall last until revoked.

Adopted: 23 June 1995

(SGD.) GUILLERMO L. PARAYNO, JR.
Commissioner

Annex A
List of Airlines and Prefix Codes (NAIA)

	Code	Airline Name
1.	AZA	Al Italia
2.	AFA	Air France
3.	BAA	British Airways
4.	BIA	Royal Brunei
5.	BRA	Eva Air
6.	CIA	China Airlines
7.	CSA	Continental Air
8.	CZA	China Southern
9.	CXA	Cathay Pacific
10.	EKA	Emirates Airlines
11.	FMA	Federal Express
12.	GAA	Garuda Airways
13.	GFA	Gulf Air
14.	JLA	Japan Airlines
15.	KEA	Korean Airlines
16.	KLA	KLM Royal Dutch
17.	KUA	Kuwait Airways
18.	LHA	Lufthansa Airlines
19.	MHA	Malaysian Airlines
20.	MSA	Egypt Air
21.	ONA	Air Nauru
22.	OZA	Aseana Airlines
23.	PXA	Air Nuigini
24.	PKA	Pakistan Airlines
25.	PEC	Pacific East
26.	PRA	Philippine Airlines
27.	NWA	Northwest Airlines
28.	QFA	Qantas Airlines
29.	SQA	Singapore Airlines
30.	SVA	Saudia Airlines
31.	SRA	Swiss Air
32.	TGA	Thai Airways
33.	UAA	United Airlines
34.	VNA	Vietnam Airlines
35.	AOD	Other than the above