Seas and Submerged Lands (Historic Bays) Proclamation 2016

Administered by Attorney-General's Department

Legislation au F2016L00301 In force Legislative Instrument

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EXPLANATORY STATEMENT

Issued by the authority of the AttorneyGeneral

Seas and Submerged Lands Act 1973

Seas and Submerged Lands (Historic Bays) Proclamation 2016

Section 8 of the Seas and Submerged Lands Act 1973 (the Act) provides that, where the GovernorGeneral is satisfied that a bay is an historic bay, he or she may, by proclamation, declare that bay to be an historic bay and shall, by the same or another proclamation, define the sea-ward limits of that bay. An historic bay is a bay which, by general acquiescence, has become part of the internal waters of Australia although the sea-ward limit exceeds that which would otherwise be permitted under the United Nations Convention on the Law of the Sea [Australian Treaty Series 1994 31].

The Seas and Submerged Lands (Historic Bays) Proclamation 2016 (the Proclamation) repeals a previous proclamation made in 2006, which declared certain bays in South Australia – Anxious Bay, Encounter Bay, Lacepede Bay and Rivoli Bay – to be historic bays. That proclamation is scheduled to sunset in accordance with Part 6 of the Legislation Act 2003. The Proclamation again declares the four bays to be historic bays and specifies geographic coordinates of the baselines and sea-ward limits of those bays. The Proclamation replicates the substance of the previous proclamation and is not intended to change the definitions of the bays. The Proclamation uses the Geocentric Datum of Australia, which is the coordinate reference system currently used in Australia for all spatial information.

A map depicting the straight baselines drawn pursuant to the Proclamation and to the Seas and Submerged Lands (Territorial Sea) Proclamation 2016, so far as scale permits, is at Attachment A. Details of the Proclamation are set out in Attachment B.

The Proclamation is a legislative instrument for the purposes of the Legislation Act 2003.

No public consultation was undertaken in relation to the Proclamation, as it merely makes minor changes to the previous proclamation.

The Proclamation commences the day after it is registered in the Federal Register of Legislative Instruments.


Attachment A


Attachment B

Details of the Seas and Submerged Lands (Historic Bays) Proclamation 2016

Section 1 – Name

Section 1 gives the name of the Proclamation as the Seas and Submerged Lands (Historic Bays) Proclamation 2016.

Section 2 Commencement

Section 2 provides that the Proclamation commences on the day after it is registered on the Federal Register of Legislative Instruments.

Section 3 – Authority

Section 3 confirms that the instrument is made under paragraph 8(a) of the Seas and Submerged Lands Act 1973 (the Act).

Section 4Schedules

Section 4 has the effect of repealing the Seas and Submerged Lands (Historic Bays) Proclamation 2006, which is referred to in Schedule 3. Section 4 also clarifies that the other items in the Schedules have effect according to their terms.

Section 5 Definitions

Subsection 5(1) defines particular terms that are used in the Proclamation as follows:

Act means the Seas and Submerged Lands Act 1973;

“Geocentric Datum of Australia” refers to the matters specified in Schedule 1;

“low-water” refers to lowest astronomical tide. Lowest astronomical tide is the lowest level to which the sea can be predicted to fall under normal meteorological conditions, and is usually estimated by reference to charts, geospatial imagery and other sources; and

“straight line” refers to a geodesic line, being the shortest possible line between two points on a curved surface.

Subsection 5(2) provides that the position on the surface of the Earth of a point, line or area is determined by reference to the Geocentric Datum of Australia (the GDA).

Section 6 – Declaration of historic bays

Article 10 of the United Nations Convention on the Law of the Sea [Australian Treaty Series 1994 31], which describes juridical bays for the purposes of international law, does not apply in relation to “historic bays”. The elements of an historic claim to waters under customary international law are the exercise of continuous sovereignty over a long period of time with the toleration or acquiescence of other States.

As part of the Offshore Constitutional Settlement, territorial sea baselines for Australia were proclaimed in 1983. In the area of South Australia, these baselines had the effect of enclosing, as Australian internal waters for the purposes of international law, Spencer Gulf, Gulf St Vincent, Investigator Strait and certain bays including Coffin Bay, Streaky Bay and Fowlers Bay. However, it was agreed between the Commonwealth and South Australia that a joint committee would be established to examine whether certain bays in South Australia were historic bays or historic waters. The Committee examined historical and other evidence and concluded that Encounter Bay, Lacepede Bay, Rivoli Bay and Anxious Bay met the criteria for being considered as historic bays, and recommended the making of a proclamation under the Act declaring these bays to be historic bays.

Section 6 again declares the specified bays to be historic bays.

Section 7 – Sea-ward limits – Anxious Bay

Subsection 7(1) specifies that the sea-ward limits of Anxious Bay are defined by straight lines joining the low-water line of the coast that are closest to the geographic coordinates specified in subsection 7(2).

Section 8 – Sea-ward limits – Encounter Bay

Subsection 8(1) specifies that the sea-ward limits of Encounter Bay are defined by straight lines joining the low-water lines of the coast that are closest to the geographic coordinates specified in subsection 8(2).

Section 9 – Sea-ward limits – Lacepede Bay

Subsection 9(1) specifies that the sea-ward limits of Lacepede Bay are defined by straight lines joining the low-water lines of the coast that are closest to the geographic coordinates specified in subsection 9(2).

Section 10 – Sea-ward limits – Rivoli Bay

Subsection 10(1) specifies that the sea-ward limits of Rivoli Bay are defined by straight lines joining the low-water lines of the coast that are closest to the geographic coordinates specified in subsection 10(2).

Section 11 – Low-water line of the same island

Section 11 makes provision for where a bay closing line provided for by any of sections 7, 8, 9 or 10 would pass through an island at two different points. In that case, the bay closing line is taken to be along the lowwater line of the island on the sea-ward side of the points of intersection of the straight line and the island’s coast.

Schedule 1 – Geocentric Datum of Australia

The GDA is the coordinate reference system currently used in Australia.

Item 1 – Reference ellipsoid

The item specifies the reference ellipsoid.

Item 2 – Reference frame

The item explains how the GDA is realised.


Statement of Compatibility with Human Rights

Prepared in accordance with Part 3 of the Human Rights (Parliamentary Scrutiny) Act 2011

Seas and Submerged Lands (Historic Bays) Proclamation 2016

This disallowable legislative instrument is compatible with the human rights and freedoms recognised or declared in the international instruments listed in section 3 of the Human Rights (Parliamentary Scrutiny) Act 2011.

 Overview of the disallowable legislative instrument

The Seas and Submerged Lands (Historic Bays) Proclamation 2016 declares certain bays in South Australia – Anxious Bay, Encounter Bay, Lacepede Bay and Rivoli Bay – to be historic bays, and defines the seaward limits of those bays.

The Proclamation is made under paragraph 8(a) of the Seas and Submerged Lands Act 1973. Paragraph 8(a) provides that, where the Governor-General is satisfied that a bay is an historic bay, he or she may, by proclamation, declare that bay to be an historic bay and shall define the seaward limits of that bay. Under international law, an historic bay is a bay which, by general acquiescence, has become part of Australia’s internal waters although the sea-ward limit of the bay exceeds that which would otherwise be permitted.

Human rights implications

This disallowable legislative instrument does not engage any of the applicable rights or freedoms.

Conclusion

This disallowable legislative instrument is compatible with human rights as it does not raise any human rights issues.

 

Overview

The Seas and Submerged Lands (Historic Bays) Proclamation 2016 is a legislative instrument made under the authority of the Seas and Submerged Lands Act 1973, which was enacted to address the identification and definition of historic bays in Australia. The Proclamation specifically concerns certain bays in South Australia: Anxious Bay, Encounter Bay, Lacepede Bay, and Rivoli Bay, which are declared as historic bays under the Act. An historic bay is recognised under international law as one which, by general acquiescence, has become part of Australia's internal waters despite the sea-ward limit exceeding the usual permitted extent. The Proclamation replaces a previous 2006 proclamation and sets out the geographic coordinates of the baselines and sea-ward limits of these bays, utilising the Geocentric Datum of Australia for precision. The policy objective behind the Proclamation is to affirm the status of these bays as part of Australia’s internal waters in accordance with customary international law, ensuring clarity in maritime boundaries and the exercise of Australian sovereignty.

Scope and Application

The Seas and Submerged Lands (Historic Bays) Proclamation 2016 is a legislative instrument under the Seas and Submerged Lands Act 1973, which specifically pertains to the declaration and definition of sea-ward limits for certain bays in South Australia that have been recognised as historic bays. This Proclamation applies to the Governor-General, who has the authority to declare these bays as historic under Section 8 of the Act, and subsequently to define their sea-ward limits. The declared historic bays in question are Anxious Bay, Encounter Bay, Lacepede Bay, and Rivoli Bay. The Proclamation replaces the 2006 proclamation that previously defined these bays, maintaining their status as historic bays without altering their definitions. The geographic scope of this Proclamation is confined to South Australia, where these bays are located, and it operates within the framework of the United Nations Convention on the Law of the Sea, which distinguishes between juridical and historic bays. The Proclamation does not extend to other bays or regions outside South Australia, and it operates under the Geocentric Datum of Australia for coordinate references, ensuring consistency with current spatial information standards in Australia.

Key Provisions

The Seas and Submerged Lands (Historic Bays) Proclamation 2016, pursuant to section 8(a) of the Seas and Submerged Lands Act 1973, declares specific bays in South Australia – Anxious Bay, Encounter Bay, Lacepede Bay, and Rivoli Bay – as historic bays (Section 6). The Proclamation defines the seaward limits of these bays, establishing them as internal waters of Australia under international law despite their sea-ward limits exceeding the usual permitted extent (Sections 7–10). The Proclamation also incorporates the Geocentric Datum of Australia (GDA) as the coordinate reference system for determining the geographic coordinates and baselines of these bays (Section 5). Furthermore, it specifies that the Proclamation repeals the previous proclamation from 2006 and sets the commencement date as the day after its registration on the Federal Register of Legislative Instruments (Sections 2 and 4). The Proclamation imposes obligations on the parties or entities governed by it, particularly those involved in maritime activities within the declared historic bays. These entities must adhere to the defined seaward limits and the geographic coordinates specified in the Proclamation when conducting activities such as fishing, shipping, and coastal management. Additionally, any entity engaged in maritime activities must use the GDA for determining their positions and boundaries within these bays (Section 5). Failure to comply with these defined limits and coordinate systems can lead to legal disputes and potential infringements of Australia's maritime jurisdiction. Breaches of the provisions outlined in the Proclamation may result in civil and criminal consequences. While the Proclamation itself does not specify explicit penalties, violations of the maritime boundaries and the use of the GDA could potentially lead to actions under broader maritime laws, including fines, penalties, or other enforcement measures. The consequences of non-compliance could include legal actions for infringement of maritime boundaries, which could result in substantial fines and other penalties as prescribed by relevant maritime laws and regulations. Additionally, entities that fail to comply with the geographic coordinate system requirements may face challenges in defending their maritime activities, leading to potential legal and financial repercussions.

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Area of Law
Environmental Law
Instrument
Proclamation
Concepts
Definitions & Interpretation
Commencement Provisions
Regulatory Standards

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.