- Publications and resources
- Rules and regulations
- Safety management
- Licences and certification
- About us
Go to top of page
Notice of Consultation 1702AS - Amendment of the Part 139 Manual of Standards for reduced taxiway/taxilane separation distances for aerodromes
The Manual of Standards Part 139 Amendment Instrument 2017 (No. 1) (the MOS amendment) commenced on 25 January 2017. It amended the Part 139 Manual of Standards (Part 139 MOS) to legislate the most recent standards in Annex 14, Aerodromes to the International Convention to Civil Aviation (Edition 7), as published in November 2016.
Purpose and scope of the amendment
Reflecting these new ICAO standards, the MOS amendment introduced modified, and generally reduced, minimum separation distances for aerodrome taxiways and aircraft parking position taxilanes. These reductions in taxiway minimum separation distances also consequentially reduce taxiway strip widths.
Further changes to the Part 139 MOS are pending under the post-implementation review (PIR) of the Part 139 legislation. These further changes will be the subject of future consultation through the NPRM scheduled for CASA Project AS 14/24.
Requirement for formal consultation
Subpart 11.J1 of the Civil Aviation Safety Regulations 1998 (CASR) sets out the requirements for consultation before CASA may issue a MOS or a MOS amendment. Normally, the consultation process must take place before the MOS or amendment is made.
It had been thought that the consultation with the Part 139 Aerodromes Working Group satisfied this requirement. Following these consultations, CASA expedited the MOS amendment to provide early implementation of the ICAO Annex 14 changes. The MOS amendment was, therefore, made without further consultation. Its immediate effect was to update aerodrome infrastructure standards for to 2 international aerodrome operators in Australia, which were in the advanced stages of detailed design for new runways. These projects could not otherwise have proceeded in the absence of legislative confirmation that CASA had adopted the amended ICAO Annex 14 changes.
The making and commencement of the MOS amendment enabled the relevant aerodrome operators to obtain final design approval and progress to the relevant construction phase for their projects. Additionally, other aerodrome operators have revised scope to redesign existing facilities to enable and facilitate the operation of larger aircraft.
After the MOS amendment commenced, there was doubt as to whether CASA’s consultation, carried out within the framework of broader consultation on the overall PIR, fully satisfied the specific formal consultation requirements of Subpart 11.J procedures in the CASR.
Under regulation 11.295 of CASR, this doubt may be removed by CASA issuing a Notice of Consultation in accordance with subregulation 11.280 (2) of CASR, thereby initiating a further 28 day period of public consultation on the MOS amendment as made.
This further period of consultation is to ensure that CASA has fully complied with the formal consultation requirements for the making of a MOS. As such, this additional consultation does not in any way affect the MOS amendment as commenced on 25 January 2017, which continues in force and effect according to its terms.
- Notice of Consultation 1702AS
- Annex A - Manual of Standards Part 139 Amendment Instrument 2017 (No. 1)
- Annex B - Explanatory Statement to the Manual of Standards Part 139 Amendment Instrument 2017 (No. 1)
How to respond
Please forward your response via the CASA online response form by close of business 29 March 2017.
How we handle your feedback
At the end of the response period for public comment, we will register and review each comment and submission received through the online response form, but will not acknowledge individual responses.
We will make all submissions publicly available on the CASA website unless a respondent requests that their submission remain confidential. Information about how we consult and how to make a confidential submission is available on the CASA website.
When the CD submissions are published we will also publish a summary of consultation. The summary of consultation will summarise the feedback received and detail our plans for future policy on this subject.
Summary of consultation
CASA published Notice of Consultation 1702AS - Amendment of the Part 139 Manual of Standards for reduced taxiway/taxilane separation distances for aerodromes on the CASA website from 1 - 29 March 2017.
One confidential response was received.
1 Subpart 11.J-Manuals of Standards-procedures.