5.1. You and your agent shall ensure that your domain name application contains accurate and reliable contact details. You shall ensure that you or your agent promptly correct and update such contact details during the term of the domain name registration, including but not limited to
a) your full name, postal address, e-mail address, voice telephone number, and (where available) fax number,
b) information required by Registry Administrator, e.g. company papers or trademark certificates, and
c) in the case that you are an organization, association, or corporation,: the name of an authorized person for contact purposes.
5.2. The willful provision of inaccurate or unreliable information by you or your agent; the willful failure of you or your agent to promptly update information provided to Telenet NV, or the failure by you or your agent to respond for over fifteen (15) calendar days to inquiries by Telenet NV concerning the accuracy of the information associated with your registration, shall constitute a material breach of this contract, and shall entitle Registrar to cancel the domain name registration.