Sec. 101.151.  REQUIREMENTS FOR ENFORCEABLE PROMISE.  A promise to make a contribution or otherwise pay cash or transfer property to a limited liability company is enforceable only if the promise is:
(1)  in writing;  and
(2)  signed by the person making the promise.
Acts 2003, 78th Leg., ch. 182, Sec. 1, eff. Jan. 1, 2006.