Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

United Kingdom Continental Shelf definition

What does United Kingdom Continental Shelf mean? In practice, “United Kingdom Continental Shelf” (UKCS) describes the offshore seabed and subsoil areas around the UK where the UK exercises sovereign rights to explore for and exploit oil, gas and certain other non‑living natural resources. It does not cover the water column or airspace. The concept derives from international law (UNCLOS) and is given effect in UK legislation, principally the Continental Shelf Act 1964 and Orders in Council designating areas, with extensive use across sectoral statutes (including the Petroleum Act 1998 and Energy Acts). The UKCS includes major provinces in the North Sea, West of Shetland/Atlantic Margin, the Irish Sea,...

UKCS oil and gas asset transfers: LOGIC Master Deed—pre-emption, standardised transfer arrangements, Execution Deeds drafting, Master Deed Online and NSTA consents

Published by a LexisNexis Energy expert

Practice notes

The Master Deed is the standardised mechanism used across the united kingdom continental shelf (UKCS) to formalise asset transfers. It is long-established and addresses two strands: (i) pre-emption, and (ii) standardised transfer arrangements. Its four principal objectives are to:

bring existing pre-emption provisions into a common form
provide pro-forma transfer arrangements
cut complexity around document execution, and
deliver greater certainty over completion timing

Structure

The concept is embedded in the main body of the Master Deed, but most day-to-day operative provisions sit in the schedules, arranged as follows:

main body — appoints the Administrator to operate the Master Deed processes and provides for new parties to join via a deed of adherence
schedule 1 — lists the Contracting Parties at the date of signature
schedule 2 — New Transfer Arrangements — whose Annexes include the Execution Deed
schedule 3 — New Pre-Emption Arrangements, and
schedule 4 — Deed of Adherence

The Administrator

Run by an Administrator appointed under Clause 5, the process is undertaken by UKCS Administrator Limited (a subsidiary of LOGIC)...

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Isla Stewart

Matheson LLP

Isla is an Associate in the Oil & Gas team. She qualified in 2010 after spending her traineeship with a leading international law firm. Isla then spent three years with the offshore oil and gas industry's leading trade association, Oil & Gas UK, as their in-house lawyer where she gained a strong background in working on complex industry issues across the UKCS. Isla advises both operator and service sector clients on a range of aspects including asset acquisitions and disposals, joint venture matters and service sector contracts. She has also been involved in a number of industry initiatives, most prominently the revision of the LOGIC general terms and conditions, the competing interests of the renewables industry offshore and the development of post-tax security for decommissioning security agreements. Isla has also spent time on secondment to upstream oil and gas companies...

Web page updated on 22/05/2026

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