This excerpt taken from the HPQ DEF 14A filed Jan 27, 2010.
Incentive Stock Option Limitations/Terms.
(a) Eligibility. Only employees (as determined in accordance with Section 3401(c) of the Code and the regulations promulgated thereunder) of the Company or any of its Subsidiaries may be granted Incentive Stock Options.
(b) $100,000 Limitation. Notwithstanding the designation Incentive Stock Option in an Option Agreement, if and to the extent that the aggregate Fair Market Value of the Shares with respect to which Incentive Stock Options are exercisable for the first time by the Awardee during any calendar year (under all plans of the Company and any of its Subsidiaries) exceeds U.S. $100,000, such Options shall be treated as Nonstatutory Stock Options. For purposes of this Section 9(b), Incentive Stock Options shall be taken into account in the order in which they were granted. The Fair Market Value of the Shares shall be determined as of the Grant Date.
(c) Effect of Termination of Employment on Incentive Stock Options. Unless otherwise provided for by the Administrator, upon an Awardees Termination of Employment, any outstanding Incentive Stock Option granted to such Awardee, whether vested or unvested, to the extent not theretofore exercised, shall terminate immediately upon the Awardees Termination of Employment.
(d) Leave of Absence. For purposes of Incentive Stock Options, no leave of absence may exceed ninety (90) days, unless reemployment upon expiration of such leave is guaranteed by statute or contract. If reemployment upon expiration of a leave of absence approved by the Company or a Subsidiary is not so guaranteed, an Awardees employment with the Company shall be deemed terminated on the ninety-first (91st) day of such leave for Incentive Stock Option purposes and any Incentive Stock Option
granted to the Awardee shall cease to be treated as an Incentive Stock Option and shall terminate upon the expiration of the three month period following the date the employment relationship is deemed terminated.
(e) Transferability. The Option Agreement must provide that an Incentive Stock Option cannot be transferable by the Awardee otherwise than by will or the laws of descent and distribution, and, during the lifetime of such Awardee, must not be exercisable by any other person. If the terms of an Incentive Stock Option are amended to permit transferability, the Option will be treated for tax purposes as a Nonstatutory Stock Option.
(f) Other Terms. Option Agreements evidencing Incentive Stock Options shall contain such other terms and conditions as may be necessary to qualify, to the extent determined desirable by the Administrator, with the applicable provisions of Section 422 of the Code.