(a) Trust Assets May Not Be Diverted. The assets of the trust shall be held for the exclusive benefit of the participants and their beneficiaries. It shall not be possible for any part of the corpus or income of the trust or any funds contributed thereto to be used for, or diverted to, purposes other than the exclusive benefit of such participants or their beneficiaries, whether by operation or natural termination of the trust, by power of revocation or amendment, by the happening of a contingency, by collateral arrangement, or by other means. No benefits payable as set forth in the plan shall be assignable or be subject to execution, levy, attachment, garnishment, or other legal process. Accordingly, the plan shall not recognize any domestic relations order attempting to provide a participant's benefits, or any portion thereof, to an alternate payee.

(b) Vesting. The retirement benefit earned by a participant shall be fully vested no later than the date he or she becomes eligible for a normal service retirement benefit. Benefits of affected participants also shall become vested, to the extent funded, upon the termination or partial termination of the trust or the complete discontinuance of contributions to the trust.

(c) Forfeitures May Not Increase Benefits. Forfeitures resulting from a termination of employment or a withdrawal of a participant's own contributions may not be used to increase benefits to remaining participants. This shall not preclude an increase in benefits by amendment to the benefit formula made possible by favorable investment results or for any other reason.