Court ruling pushes back environmental deadline for offshore gas block

Offshore exploration decisions

SOUTH AFRICA: Africa Energy Corp has been granted a further extension, until 4 November 2026, to submit a new Environmental and Social Impact Assessment (ESIA) for Block 11B/12B off the southern coast of South Africa. The block, which sits in deep water in the Outeniqua Basin, is one of the country’s most closely watched offshore gas prospects.

The extension follows a recent ruling by the Western Cape High Court on a separate offshore block, 5/6/7, held by an unrelated operator. The court set aside the environmental authorisation already granted for that block and ordered that fresh and amended environmental studies be carried out before the Minister of Mineral and Petroleum Resources reconsiders the matter. The unrelated operator has since applied for leave to appeal the decision to the Supreme Court of Appeal.

Although the court case does not involve Block 11B/12B directly, it has reshaped the regulatory landscape for all offshore exploration off South Africa. Africa Energy says it is working with its legal advisors to decide on the best way forward for its own ESIA in light of the judgment. The company holds its interest in the block through Main Street 1549 Pty Ltd.

Environmental authorisation is a non-negotiable step before a production right can be issued in South African waters. Until that authorisation is in place, no drilling, development or production work can move ahead on Block 11B/12B. The High Court ruling signals that the regulator and courts are prepared to send environmental approvals back for further work if they fall short, which has implications for any operator planning offshore activity in the region.

For maritime service providers, including offshore support vessel operators, surveyors, supply base operators and coastal logistics firms, the extension means that work tied to the development of Block 11B/12B is unlikely to begin in the short term. Mobilisation timelines for any future drilling or appraisal campaign will only firm up once the environmental authorisation and production right are in hand.

Ownership and the road ahead

Main Street currently holds a 10% participating interest in Block 11B/12B. Following a restructuring announced in May 2025, and subject to regulatory approval of the withdrawal of the joint venture partners, Africa Energy expects to hold a 75% direct interest in the block. Both the transfer of the withdrawing parties’ interest and the completion of the Main Street restructuring depend on the production right being granted.

Block 11B/12B has long been viewed as a potential cornerstone of South Africa’s domestic gas supply, particularly in the wake of earlier discoveries in the area. Until the environmental and regulatory hurdles are cleared, however, the project will remain in a holding pattern, with the November 2026 deadline now the next major milestone for the industry to watch.