This excerpt taken from the DIS DEF 14A filed Jan 6, 2005.
Incentive Stock Options
An incentive stock option results in no taxable income to the optionee or a deduction to the Company at the time it is granted or exercised. However, the excess of the fair market value of the shares acquired over the option price is an item of adjustment in computing the alternative minimum taxable income of the optionee. If the optionee holds the stock received as a result of an exercise of an incentive stock option for at least two years from the date of the grant and one year from the date of exercise, then the gain realized on disposition of the stock is treated as a long-term capital gain. If the shares are disposed of during this period, however, (i.e., a disqualifying disposition), then the optionee will include in income, as compensation for the year of the disposition, an amount equal to the excess, if any, of the fair market value of the shares, upon exercise of the option over the option price (or, if less, the excess of the amount realized upon disposition over the option price). The excess, if any, of the sale price over the fair market value on the date of exercise will be a short-term capital gain. In such case, the Company will be entitled to a deduction, in the year of such a disposition, for the amount includible in the optionees income as compensation. The optionees basis in the shares acquired upon exercise of an incentive stock option is equal to the option price paid, plus any amount includible in his or her income as a result of a disqualifying disposition.