(1)  A registered enterprise agreement remains in force for the period specified in the agreement, being a period not exceeding 5 years.

(2)  The parties to a registered enterprise agreement, by mutual consent, may make a further agreement to extend the registered enterprise agreement.

(3)  If the parties to the registered enterprise agreement (other than the enterprise employer) include individuals or an employee committee, a further agreement may be entered into by those individuals or that employee committee only after at least 60% of the persons employed in the enterprise in the one or more classes of employment to which the enterprise agreement applies agree to it by secret ballot.