Converting a certificate of competency to a gasfitting permit

Information status

All documents issued prior to 1 July 2017 were issued by the former Department of Commerce. Documents listed here are the latest versions available, but may be subject to review. For more information on this document, please contact

This publication is for: 
Gas workerTradesperson

This application form is used to convert your certificate of compentency to a gasfitting permit.

Fact sheet - gasfitting certificate of competency to permit

This fact sheet explains what your entitlements are and how to obtain a gasfitting permit when surrendering your certificate of competency to EnergySafety.

Certificate of competency (CoC)

CoCs were issued by the State Energy Commission (SEC) in the 1980's and early 1990's so that the holder could carryout gasfitting work.  Each CoC carried an endorsement identifying a class of gasfitting which the holder could perform:

  • Class A was for installation work where teh gas in use was lighter than air, ie natural gas;
  • Class B was for service work on installations where the gas in use was lighter than air;
  • Class C was for installation work where the gas in use was heavier than air ie LP gas;
  • Class D was for service work on installations where the gas in use was heavier than air;
  • Class E was for the installation on LP gas vehicle engines in accordance with AS 1425;
  • Class F was for service work on LP gas vehicle engines which complied with AS 1425.

In the early 1990's the issuing of CoCs was phased out in favour of permits as the primary licensing method for gas fitters.


The Gas Standards (Gasfitting and Consumer Gas Installations) Regulations 1999 were introduced in 1999.  These regulations better reflected the needs of industry by referencing national standards and introduced a more appropriate gas fitter classification system:

  • Class G (general gasfitting) issued for gasfitting on consumer gas installations associated with Type A gas appliances (listed in the regulations) and piping systems operating up to 200 kPa;
  • Class I (industrial gasfitting) issued for working on Type B gas appliances and pipings systems operating above 200 kPa;
  • Class E issued for working on mobile engines, cars or marine craft operating on gas;
  • Class P issued for working on auto gas refuelling facilities.


All classes of gasfitting may be restricted eg restricted to installation or to LP gas only etc.

Why should I upgrade?

It is planned to introduce a national occupational licensing system (NOLS) for gasfitters in July 2012.

Perpetual licenses such as CoCs, are not compatible with the proposed NOLS structure.  It is intended to provide for the abolishment of CoCs when WA introduces national occupation licensing legilslation.  The process for converting from a CoC to a permit is likely to be more stringent when NOLS legislation is introduce with tighter requirements to be met by gas fitters, the Director of Energy Safety has waived the permit fee for the two years.

What am I entitled to?

What you are entitled to is determined by the Coc classes and demonstration of competencies.  A class G and/or E permit with equivalent restrictions as applies to the CoC will be issued without additional proof of competency.  See below for an indication of the equivalent CoC and Permit classes and restrictions.

If the applicant requires a Class I or Class P permit, or in the case of a Class E permit for any gas type other than LP gas, then they must supply evidence that they are competent to do that work.

How do I upgrade?

An applicant must fill in an application form and submit it with the additional documents as required, to the Licensing branch of EnergySafety.

Applications forms can be obtained from the Licensing branch or by downloading the above form and printing it off.

The original CoC should be returned with the application.  Where the CoC cannot be located, a letter from the applicant stating that the Coc is being surrendered is sufficient.

Where evidence of competency is required it may take the form of, but is not limited to:

  • Notice of completion for the type of work the application is for;
  • Training certificates/qualifications covering the work the application is for; or
  • References from a qualified person, eg gas inspector, supporting the application.

For further information on the type of evidence required, contact the Gas Utilisation Branch on (08) 9422 5200.

Application for a permit and further information can be obtained from:

303 Sevenoaks Street (Entrance Grose Avenue)
Cannington WA 6107
Telephone: (08) 6251 2000
Facsimile: (08) 6251 1902

Licensing office hours:
8:30am to 4:30pm Monday to Friday

Matrix - certificate of competency and permit class and restriction equivalents

Class G permit

Certificate of competency class Equivalent Class G permit
A Installing Natural Gas
B Servicing Natural Gas
A, B Installing and servicing Natural Gas 
C Installing LP Gas
A, C Installing Natural Gas and LP Gas
A, B, C Servicing Natural Gas, installing Natural Gas and LP Gas
D Servicing LP Gas
B, D Servicing Natural Gas and LP Gas
A, B, D Installing Natural Gas, servicing Natural Gas and LP Gas
C, D Installing and servicing LP Gas
A, C, D Servicing LP Gas, installing Natural Gas and LP Gas
B, C, D Installing LP Gas, servicing Natural Gas and LP Gas
A, B, C, D No restrictions


Class E Permit (covers mobile engines)

Certificate of competency class Equivalent Class E permit
E or E with CD Installing LP Gas
F or F with CD Servicing LP Gas
E, F Installing and servicing LP Gas
E, F (Forklifts only) Installing and servicing Forklifts - LP Gas 


Class G and Class E permits

Certificate of competency class Equivalent gasfitting permit class
A, B, C, D, E Class G - No restrictions
Class E - Installing LP Gas
A, B, C, D, F Class G - No restrictions
Class E - Servicing LP Gas
A, B, C, D, E, F Class G - No restrictions 
Class E - Installing and servicing LP Gas 


For Class I, Class P, or Class E endorsements for LNG or CNG contact EnergySafety.

This document is not intended to be a complete statement of EnergySafety policy, nor does it attempt to waive or modify any legal obligation.


Form – application
Last updated 29 Jun 2017

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