4.2 Suffix Conventions, Special Event Prefixes (AX, VI, VJ) & Reciprocal Licensing
Key Takeaways
For ordinary VK assignments, new two-letter suffixes are for Advanced amateurs and three-letter suffixes are available at all three levels. Existing four-letter F-series signs can be retained.
On 26 January, 25 April and 17 May, section 12(4) allows an eligible personal VK call sign to substitute AX. Other special-event use follows the event assignment.
Assigned contest call signs can use VJ, VK or VL and are limited to qualifying contests. They are issued to Advanced amateurs.
An eligible non-resident visiting amateur places VK before the assigned overseas call sign and follows the conditions for the Australian qualification equivalent.
Distinguish the assignment categories
ACMA assigns Australian call signs. For ordinary VK assignments outside the VK0 and VK9 categories, a new two-letter suffix is for an Advanced operator. A three-letter suffix is available at Foundation, Standard or Advanced level. The older four-letter Foundation F-series, such as VK2FAAA, remains usable where the operator retains the assignment. ACMA has stopped issuing new F-series call signs. Determine operating limits from the applicable qualification and licence conditions.
| Category | Scope of use |
|---|---|
| Ordinary VK assignment | Ongoing unless surrendered, transferred or cancelled. ACMA normally contacts the holder to reconfirm every five years. |
| Special event assignment | ACMA can assign VI, VK or AX forms. Section 12(6) confines use to the relevant event. |
| Contest assignment | VJ, VK or VL, followed by an area digit and one suffix letter. The applicant needs Advanced qualification. Section 12(5) limits use to a qualifying amateur contest. |
| VK0 and VK9 | Separate ACMA assignments, with location conditions in section 12(7)–(9). |
The assignment period for VK0, VK9, special event and contest call signs is generally 12 months under ACMA policy. The assignment certificate states the period. An eligible holder can apply for reassignment. ACMA reconfirmation of ordinary and retained F-series assignments is free. Reassignment of the fixed-period categories is a separate application.
Apply the AX substitution
On 26 January (Australia Day), 25 April (Anzac Day) and 17 May (World Telecommunication Day), an operator using an eligible assigned VK call sign for routine personal station identification can replace VK with AX under section 12(4). For example, VK2ABC can use AX2ABC on 25 April without applying for a separate AX assignment for that date. The digits and suffix stay the same. Using AX for a special event outside those dates requires the corresponding assignment. ACMA policy excludes repeater, beacon and contest call signs from this routine substitution.
Worked event check. A club plans a local anniversary station in July and wants an AX call sign related to that event. July is outside the three routine substitution dates, so the operator applies for an event assignment. ACMA asks for the date, its significance and an explanation connecting the requested sign to the occasion. The policy allows one to four numbers and up to ten suffix letters for these event forms. If the application is granted, use the sign for the relevant event during the assignment period. The same operator uses their ordinary sign for a different club net outside that event.
A short suffix can help an operator make calls efficiently during a contest. An Advanced holder of an assigned contest sign checks that the organiser exists primarily for amateur purposes and uses the sign while competing in that contest. The same holder can keep a personal ordinary assignment for routine operating. Compare the event and contest authority to the single-day AX substitution before changing the prefix on air.
Check reciprocal operating authority
An overseas visitor using Class Licence section 8(b) must be a non-resident visiting Australia, have spent no more than 365 continuous days in Australia since their most recent entry, hold a recognised overseas qualification and have an assigned overseas call sign. Look up the applicable recognition and Australian qualification equivalent in ACMA’s current tables. Use that equivalent’s frequency, emission and power conditions.
Section 12(3) places VK before the assigned overseas call sign. ACMA guidance allows adding an area digit after VK. For example, an eligible visiting operator whose assigned sign is G0XYZ can identify as VK/G0XYZ, or VK3/G0XYZ while in Victoria if they choose to give the area. For an Australian going overseas, check the destination’s arrangements. The CEPT temporary operating framework and the qualification recognition framework are covered in section 7.1.
Worked visitor check. A non-resident visiting Australia for two weeks presents a UK Intermediate licence. ACMA’s equivalency table lists that licence at Australian Standard level. The visitor still checks their assigned overseas call sign and applies the Australian Standard frequency and power limits. If the same visitor has stayed continuously for more than 365 days, the visitor provision no longer supplies authority. The next step is to check the Australian qualification and call sign pathways. The destination administration makes the corresponding operating decision when an Australian amateur travels overseas.
ACMA amateur call signs · ACMA overseas visitor guidance and equivalency tables · Amateur Class Licence
A Standard operator with an assigned ordinary VK2ABC call sign wants to use AX2ABC on 25 April during routine personal operation. What applies?
AX requires the operator to obtain an Advanced qualification.
Only a club may use AX2ABC on that date.
AX2ABC requires a new assignment and fee for that date.
The operator may substitute AX for VK under section 12(4).
An eligible overseas visitor with call sign G0XYZ is operating from Victoria. Which identification follows the Australian prefix rule?
VK3/G0XYZ.
G0XYZ/VK3.
G0XYZ.
AX3/G0XYZ.
An Advanced operator holds an assigned VL3A contest call sign. When may the operator transmit it?
Whenever the 12-month assignment is active.
When competing in a contest run by an organisation that exists primarily for amateur purposes.
Whenever running a regular club net.
On every public holiday in Victoria.
Sections you finish are checked off in the contents.