system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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CONFIDENTIAL TREATMENT - REDACTED VERSION CORIO INC. LICENSE AND HOSTING AGREEMENT This License and Hosting Agreement (the "AGREEMENT") is made and entered into as of December 13, 1999 ("EFFECTIVE DATE") by and between Corio Inc., a Delaware corporation, having its principal place of business at 700 Bay Road, Suite 210, Redwood City, CA 94063 ("CORIO") and Changepoint, Inc., a Delaware corporation having a place of business at 1595 Sixteenth Ave., Suite 700, Richmond Hill, Ontario, Canada L4B 3N9 ("CHANGEPOINT"). BACKGROUND A. Changepoint is the owner or has the right to license certain proprietary software products (the "SOFTWARE" as further defined below); and B. Corio wishes to obtain a license to use and host the Software on the terms and conditions set forth herein in connection with the hosting services that Corio will provide to its Customers (as defined below) and Changepoint wishes to grant Corio such a license on such terms; C. The parties further wish to jointly market and promote the other party's software and/or services as well as provide support services to Corio and its Customers in accordance with this Agreement. NOW, THEREFORE, for good and valuable consideration, the parties hereby agree as follows: 1. DEFINITIONS. The following terms shall have the following meanings: 1.1 "SOFTWARE USER" means a named user of the Corio Services worldwide to whom a user identification number and password has been assigned, which permits that user to access and use the Software on a designated Corio Server. The identification number and password used by a Software User is reusable and reassignable and may be used and transferred by Corio, in accordance with the licenses granted below, between Customers as one Customer discontinues the Corio Services and another Customer subscribes. 1.2 "ASP" means Application Service Provider. 1.3 "APPLICATION MANAGEMENT REVENUE" means all revenue Corio receives from Customers for use of the Software and basic support of the Software provided at no additional charge to Customers (Level 1 and Level 2 support as defined in Exhibit C hereto), operational support of the Software and basic infrastructure support (hardware, database and operating system) for the Software, less taxes, freight, insurance, refunds or credits and other non-product items. 1.4 "CORIO SERVERS" means the unlimited number of computer servers owned or operated by or for Corio in North America which will contain the installed Software (as defined below) for access by Customers in connection with the Corio Services. 1.5 "CORIO SERVICES" means the hosting services offered by Corio to its Customers in which Corio allows Customers to access the Corio Servers. 1 1.6 "CUSTOMER(S)" means one or more customers of the Corio Services having its principal executive offices in North America who obtains a sublicense from Corio to use the Software by accessing one or more Corio Servers. 1.7 "DEMONSTRATION SOFTWARE" means copies of the Software which are for demonstration purposes only and which contain sample data and transactions. 1.8 "DOCUMENTATION" means any on-line help files or written instruction manuals regarding the use of the Software. 1.9 "RELATIONSHIP MANAGERS" means the appointed employee of each party, as set forth on EXHIBIT A attached hereto and made a part hereof, who shall be the primary contact for implementing and administering the terms and conditions of this Agreement. 1.10 "SOFTWARE" means Changepoint's proprietary software described in EXHIBIT A attached hereto and made a part hereof, in object code form only, and any Updates or Upgrades (as defined below) thereto. The Software shall also include any Application Programming Interfaces ("API") provided by Changepoint to Corio, but such API intellectual property shall not be sublicenseable to Customers. 1.11 "TERRITORY" means throughout the world. 1.12 "UPDATE(S)" means any error corrections, bug fixes, modifications or enhancements to the Software made generally available by Changepoint to its licensees, which are indicated by a change in the numeric identifier to the Software in the digit to the right of the decimal, or any error corrections, bug fixes, modifications or enhancements of the Software. 1.13 "UPGRADE(S)" means a release, function or version of the Software designated as such by Changepoint which contains new features or significant functional enhancements to the Software, which are indicated by a change in the numeric identifier for the Software in the digit to the left of the decimal, which Upgrade is provided to Changepoint's installed customer base for the Software. For the purposes of this Agreement, "Software Support and Maintenance" means those services listed in Section 5.3 of this Agreement and EXHIBIT C and the provision of Updates and Upgrades as called
"""

Extract the exact clause related to "Effective Date" from the excerpt above.

assistant: December 13, 1999