Employee may revoke this Agreement for a period of seven (7) calendar days following the day he executes this Agreement (“Revocation Period”). Any revocation must be submitted, in writing, by email to fernando.esquivel@ansys.com or by either hand delivery or certified U.S. Mail, return receipt requested, to Fernando Esquivel, Vice President of Human Resources, ANSYS, Inc., 2600 Ansys Drive, Canonsburg, Pennsylvania, 15317. The revocation must be delivered or postmarked within the Revocation Period. This Agreement will become effective on the day after the expiration of the applicable Revocation Period (“Effective Date”).