This excerpt taken from the HPQ DEF 14A filed Jan 27, 2010.
Procedure for Exercise; Rights as a Shareholder.
i. Any Option granted hereunder shall be exercisable according to the terms of the Plan and at such times and under such conditions as determined by the Administrator and set forth in the respective Award Agreement. Unless the Administrator provides otherwise: (A) no Option may be exercised during any leave of absence other than an approved personal or medical leave with an employment guarantee upon return; and (B) an Option shall continue to vest during any authorized leave of absence and such Option may be exercised to the extent vested and exercisable upon the Awardees return to active employment status.
ii. An Option shall be deemed exercised when the Company receives (A) written or electronic notice of exercise (in accordance with the Award Agreement) from the person entitled to exercise the Option; (B) full payment for the Shares with respect to which the related Option is exercised; and (C) with respect to Nonstatutory Stock Options, payment of all applicable withholding taxes.
iii. Shares issued upon exercise of an Option shall be issued in the name of the Participant or, if requested by the Participant, in the name of the Participant and his or her spouse. Unless provided otherwise by the Administrator or pursuant to this Plan, until the Shares are issued (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive dividends or any other rights as a shareholder shall exist with respect to the Shares subject to an Option, notwithstanding the exercise of the Option.
iv. The Company shall issue (or cause to be issued) such Shares as soon as administratively practicable after the Option is exercised. An Option may not be exercised for a fraction of a Share.