I, WILLIAM BRUCE BYRON, Director of Aviation Safety, on behalf of CASA, make this instrument under regulation 33B the Civil Aviation Regulations 1988.

[Signed Bruce Byron]

Bruce Byron
Director of Aviation Safety and
    Chief Executive Officer

11 December 2007

Civil Aviation Order 100.23 Instrument 2007

1 Name of instrument

 This instrument is the Civil Aviation Order 100.23 Instrument 2007.

2 Commencement

 This instrument commences on the day after it is registered.

3 New Civil Aviation Order 100.23

 Civil Aviation Order 100.23 is repealed and a new Civil Aviation Order 100.23 substituted as set out in Schedule 1.

Schedule 1 Civil Aviation Order 100.23

Airworthiness Authorities — General

1 Authority classes and ratings

 Airworthiness authorities will be issued in the following classes and, where applicable, rated in accordance with the appropriate practices or Civil Aviation Orders:

Maintenance Authority Civil Aviation Order 100.24;

Aircraft Maintenance Engineer Civil Aviation Order 100.26;
Examiner Authority

Non-Destructive Testing Authority Civil Aviation Order 100.27;

Aircraft Weight Control Authority Civil Aviation Order 100.28.

2 Requirements for issue

 2.1An applicant for an airworthiness authority must complete:

Form 350 Application for Initial Issue or Amendment to Scope of a Maintenance Authority; or

Form 636 Application for Initial Issue and Additional Entitlements on an Aircraft Maintenance Engineer Examiner Authority; or

Form 378 Application for Initial Issue of, or Additional Method to, a Non‑Destructive Testing Authority; or

Form 377 Application for Initial Issue or Amendment of an Aircraft Weight Control Authority;

 as applicable and forward it to the field office of the Civil Aviation Safety Authority of the State or Territory in which he is resident. Where particular experience and/or qualifications are specified in the relevant Order, full details of such experience and qualifications must be supplied with the application.

 2.2The issue of an authority to an applicant may be refused if he has a disability likely to affect his technical skill or judgment.

 2.3Unless otherwise approved, an applicant for an authority must:

(a) be at least 21 years of age; and

(b) be able to read, write and speak the English language; and

(c) possess such experience as is required by the Director; and

(d) pass such examinations as are required by the Director.

 2.4An applicant may be required to be interviewed to determine his eligibility to complete any written, oral or practical examination relevant to the issue, extension or renewal of an authority.

3 Examination

 3.1Subject to approval to the contrary, an applicant will be examined in accordance with the requirements detailed in the applicable Civil Aviation Order. Where an applicant fails to obtain a pass in an examination, a further attempt may be made at the discretion of the examiner and subject to such conditions as he or she may specify.

 3.2Examinations for the issue or extension of authorities will be arranged individually for applicants. Regular periodic examinations for authorities are not provided.

 3.3The holder of an authority may, at any time, be required to undergo an examination in respect of any rating endorsed on the authority.

4 Period of validity

 4.1The period for which an authority is valid will depend upon the purpose for which it is issued, and will be specified in the authority. The period will generally not exceed 2 years.

 4.2Upon application by the holder, an authority may be renewed subject to such of the conditions relating to an original issue as are appropriate.

 4.3During the period of validity of the authority, the holder must notify, in writing, the appropriate field office of any change of address to which communications, under the Civil Aviation Regulations 1988 and the Civil Aviation Orders, may be sent.

 4.4The holder of an authority who has a disability, that is likely to affect his or her technical skill or judgment, must not exercise the privileges of the authority.

5 Withdrawal or cancellation of authority

 An authority may be withdrawn, or cancelled, in any of the following circumstances:

(a) where the reason for issue of the authority no longer exists; or

(b) where the Director is satisfied that the withdrawal, or cancellation, is in the public interest; or

(c) where the holder of the authority is no longer considered competent by the Director; or

(d) at the request of the holder.