This excerpt taken from the EBAY DEF 14A filed Apr 30, 2007.
DURATION, AMENDMENT, AND REPRICING
The Board may amend, suspend or terminate the 1999 Plan at any time or from time to time. Stockholders approved the 1999 Plan at our 2000 Annual Meeting of Stockholders. Stockholder approval of any amendment to the 1999 Plan must be sought only if necessary under applicable laws or regulations, but the Board may submit any amendment to the 1999 Plan for stockholder approval at its discretion. Additionally, stockholder approval is required before the Board may cancel an option and replace it with a new option or cash, reduce the exercise price of any option it has already granted under the 1999 Plan, or take any other action with respect to any outstanding option that is treated as a repricing under generally accepted accounting principles. The 1999 Plan does not have a set termination date, but the Board may terminate the plan at any time.