NEW YORK (Reuters) -The U.S. Federal Trade Commission allowed Chevron's $53 billion purchase of Hess Corp on Monday, in an order that barred Hess CEO John Hess from Chevron's board. The FTC's order leaves Exxon Mobil's challenge to the deal, which is expected to stretch deep into next year, as its final hurdle.

Key Takeaways Chevron's $53 billion acquisition of Hess cleared a regulatory hurdle Monday as the Federal Trade Commission (FTC) completed its review of the deal.However, the FTC barred Hess CEO John Hess from joining Chevron's board.

Chevron Corporation (NYSE: CVX) today announced the Federal Trade Commission (FTC) completed antitrust review of the company’s merger with Hess Corporation (NYSE: HES), satisfying a key closing condition for the transaction.

The US antitrust regulator will allow Chevron Corp. to proceed with its $53 billion acquisition of Hess Corp. on the condition Chief Executive Officer John Hess is barred from the supermajor’s board, alleging he improperly communicated with OPEC.

US regulators will allow Chevron Corp. to move forward with its $53 billion acquisition of Hess Corp. but are barring Chief Executive Officer John Hess from joining the supermajor’s board, saying he improperly communicated with OPEC.

The FTC on Monday alleged that John Hess encouraged senior officials at OPEC to draw down inventories, which would result in higher oil prices. Hess Corp. and Chevron have agreed that they will not appoint Hess to the board in order to facilitate the completion of the merger.