CenturyLink grants to Customer a personal, non-exclusive, non-transferable, non-sublicenseable, limited, and revocable license to use the Portal Service in accordance with this Agreement. This license commences upon Customer acceptance of these terms and remains in force until: (a) terminated upon 30 days written notice by either party to the other party; (b) terminated by CenturyLink without prior notice upon Customer’s breach of this Agreement, the Underlying Agreement(s), or as otherwise permitted under this Agreement; (c) the termination or expiration of all Underlying Agreements which could utilize the Portal Service; or (d) CenturyLink, at its sole discretion, elects to discontinue offering the Portal Service. Customer is expressly prohibited from: (a) using the Portal Service for any purpose other than Customer's own internal business purposes as reasonably intended under this Agreement; (b) allowing anyone other than Customer's representatives previously identified to CenturyLink to have access to the Portal Service; (c) making copies of the Portal Service documentation or the software underlying the Portal Service Web site; (d) making any modifications, enhancements, adaptations, derivative works, or translations of the Portal Service or underlying software; or (e) attempting to reverse engineer, disassemble, reverse translate, customize, or decompile the Portal Service or component software in order to misuse, manipulate, or use the Portal Service for purposes other than that for which it was intended, or derive the source code therefrom or for any other reason. CenturyLink reserves the right to seek all remedies available at law and in equity for any breach of this Agreement, including the right to block Customer’s access to the Portal Service or to suspend or terminate CenturyLink’s provision of the Portal Service to Customer. Customer will be responsible for all use of Customer’s account (whether or not under any screen name or user identification or password) and for ensuring that all use of Customer’s account complies fully with the provisions of this Agreement. Customer will be responsible for protecting the confidentiality of Customer’s passwords, user names, and other Customer specific access information. Customer will be responsible for all activities and charges resulting from their use, including unauthorized use. Customer agrees to promptly notify CenturyLink of any unauthorized use or access to the Portal Service.