Subscription Period 5.1.1 The Subscription Period is binding upon both Zensai and the Customer, meaning the Customer cannot terminate the Service, the Support Services and this SAAS Agreement during a Subscription Period. Notwithstanding the above, the Customer can terminate the Subscription due to a material default in the Services, cf. Section 10.3, or if a material change to the terms and conditions of the SAAS Agreement comes into force, cf. Section 16.1, and if the Customer is not in breach of the SAAS Agreement, Zensai will refund a pro rata portion of the Subscription Fee for the remaining un- used period of the Service and Support Services. 5.1.2 The Subscription Fee for the Subscription Period is defined in the Quote. The Customer may add Users or upgrade the Service during the Subscription Period but may not downgrade the number of Users during the Subscription Period. For Support Services, the Customer may upgrade its level of Helpdesk Services during a Subscription Period, but the Customer may not downgrade to a lower service level. 5.1.3 The initial Subscription Period shall be defined in the Quote as accepted by the Customer and shall cover a minimum of 12 months. At the end of the initial term, the Subscription is subject to automatic renewal with a Subscription Period running for terms of 12 months, or longer periods if agreed in a new Quote. The Subscription Fee will be invoiced upon renewal for pre-payment. The Subscription may be changed or terminated by the Customer with a notice of no less than 60 days before renewal. 5.1.4 Zensai may terminate the SAAS Agreement by giving a notice of twelve (12) months before the end of a Subscription Period.