To exercise its purchase or sale rights under Section 18.2.1 , 18.2.2 , 18.2.3 or 18.2.4 , as applicable, the non-Defaulting Shareholder shall provide notice thereof to the Defaulting Shareholder (the “ Default Option Exercise Notice ”). The closing of any such Transfer of Shares shall occur, subject to obtaining any required Consents, within thirty (30) days after the date the applicable Shareholder delivered to the Defaulting Shareholder the Default Option Exercise Notice.