The Federal Trade Commission said the oil giant can acquire the smaller company as long as the chief executive of Hess does not join its board.

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 OPEC representatives to take action that supports 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.