HOUSTON, July 3 (Reuters) - The arbitrators in a legal

dispute between Exxon Mobil ( XOM ) and Hess have

reached a decision related to a major oilfield project in

Guyana, according to two sources familiar with the matter, with

the ruling determining whether Chevron ( CVX ) can move forward

with its planned acquisition of Hess.

The Paris-based International Chamber of Commerce, which is

overseeing the arbitration case, is now reviewing the decision

before it is released to the parties.

It is unclear what the arbitrators decided or when the

decision will be released.

Exxon, Hess, Chevron ( CVX ) and the ICC did not immediately respond

to requests for comment.