This excerpt taken from the FZN DEF 14A filed Oct 9, 2007.
Option Duration. The term of each ISO shall be ten (10) years from the date of grant or such shorter term as the Board determines, except that in the case of an ISO that is awarded to an employee who, at the time of grant, owns stock possessing more than 10% of the total combined voting power of all classes of stock of the Company or any parent or subsidiary, the term of the ISO must be five (5) years or such shorter period as the Board determines. The term of each NSO is as determined by the Board. The term of any option granted under the 2007 Plan, and all other materials terms and conditions of such option, will be evidenced by an option agreement between the Company and the participant.