Exercisability and Vesting. This Option shall become exercisable and vest ☐ twenty percent (20%) on the first anniversary of the Initial Vest Date and thereafter in a series of four (4) successive equal annual installments at the end of each of the next four (4) years (minimum for employees; vesting period may be longer officers, directors and Consultants), ☐ twenty-five percent (25%) on the first anniversary of the Initial Vest Date, and thereafter in a series of thirty-six (36) successive equal monthly installments, or ☐ in a series of forty-eight (48) successive equal monthly installments starting on the Initial Vest Date (or 2.0834% per month). Vesting at the end of each annual or monthly period shall occur only if Optionee is an employee, outside director or consultant, respectively, of the Corporation at the time that such vesting is to occur.

Initial Options. Each Initial Option shall vest and become exercisable in thirty-six (36) substantially equal monthly installments following the date of grant, such that the Initial Option shall be fully vested on the third anniversary of the date of grant, subject to the Non-Employee Director continuing in service as a Non-Employee Director through each such vesting date.

Vesting Schedule: [Note: Company to elect vesting schedule; following is an example of a standard vesting provision] This Option shall become exercisable for 25% of the maximum number of shares granted on the first anniversary of the Vesting Start Date, and shall become exercisable for an additional 2.0833% of the maximum number of shares granted on the last day of each one month period thereafter; so that the Option shall be fully vested on the fourth anniversary of the Vesting Start Date. All vesting shall cease upon the date of termination of employment with or provision of services to the Company.