This excerpt taken from the MRO DEF 14A filed Mar 13, 2007.
15. Assignability. Unless otherwise determined by the Administrator and expressly provided in the Award Agreement, no Award or any other benefit under this Plan shall be assignable or otherwise transferable except by will or the laws of descent and distribution. The Administrator may, in its sole discretion, permit a Participant to designate a beneficiary with respect to an Award, and in the event that a beneficiary designation conflicts with an assignment by will, the beneficiary designation will prevail. The Administrator may prescribe and include in applicable Award Agreements or the terms of the Award other restrictions on transfer. In no event may an Option or SAR be transferred for consideration. Any attempted assignment of an Award or any other benefit under this Plan in violation of this paragraph 15 shall be null and void.