Each notary public commission is for a 6 to 7-year period ending on the notary's birthday. The term is not less than 6 or more than 7 years from the date of appointment. For example, your birthday is in April of 2004, and you apply for a commission in October of 2003, your notary commission expires on your birthday in 2010.
There is no renewal process so you must apply for a new commission each time. It is your responsibility to make application for a new appointment no more than 60-days prior to the expiration date.