The Open Acreage Concession Modality is a new form of bidding process implemented by ANP to grant concession agreements for exploration or rehabilitation and production of oil and gas. It consists in continuous offers of exploration blocks and areas with marginal accumulations located in any onshore or offshore basins relinquished or pending relinquishment to ANP. The exception are blocks located in the pre-salt polygon, in the strategic areas, or in the Continental Shelf beyond 200 nautical miles, as well as those authorized to integrate the 17th and 18th Bidding Rounds.
Detailed information is provided in the bidding rounds website, in the menu Open Acreage.