I am in PA and have a family property owned by nine people no LLC or other org. set up(deeds just say we own X amount of the property such as 1/14th. A gas company sent out contracts to all the owners for a pipeline right of way and two of the owners who own 1/28th each signed the contract no one else has. The gas co. is saying we are all locked in with this 1/14th signature. Is this true under pa law?