This excerpt taken from the UDRL DEF 14A filed Apr 28, 2009.
Payments Made Upon Voluntary Resignation.
2000 Plan. In the event of the voluntary resignation (other than upon retirement) of a named executive officer, all vested and unvested stock options are forfeited as of the resignation effective date.
2005 Plan. In the event of the voluntarily resignation (other than upon retirement) of a named executive officer, vested stock options may be exercised by the named executive officer within three months after the resignation effective date, unless the compensation committee otherwise determines to cancel, all or in part, the options.
Regarding the outstanding restricted stock unit awards made to the named executive officers, these awards were made under the 2005 Plan given that it is the only equity benefit plan under which such awards may be made. Under the 2005 Plan and the individual award agreements, in the event the named executive officer ceases to be an employee of the Company for any reason, other than as discussed below, prior to the date the RSU award vests, the award will be forfeited. However, if a named executive officer should die or become disabled while still an officer of the Company, all unvested RSUs held by such officer will then automatically vest as of the date of such death or disability. The compensation committee also has discretionary authority under the 2005 Plan to accelerate the vesting of all or any portion of the outstanding unvested RSUs held by a named executive officer.