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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1 Exhibit 10.3 I-on. (LOGO) www.i-on.com 561.394.9484 o 561.394-9773 fax 1733 avenida del sol, boca raton, florida, 33432 WEB SITE HOSTING AGREEMENT This WEB SITE HOSTING AGREEMENT ("this Agreement") is entered into this 6th day of April, 1999 by and between Centrack International, a Florida corporation ("the Customer"), and i-on interactive, a Florida corporation ("i-on"). DEFINITIONS As used in this Agreement, the term "Web site" shall mean a computer system intended to be accessed through the World Wide Web segment of the Internet, including software and content intended to be viewed and/or operated upon by persons accessing the computer system via the Internet. A Web site may exist on a single computer system with other Web sites. The term "Hosted Site" shall mean the Web site of the Customer that is hosted by i-on under the terms and conditions of this Agreement. The term "Hosting Computer" shall mean the computer system and related equipment on which the Hosted Site exists. SERVICES PROVIDED TO THE CUSTOMER i-on will maintain the operation of the Hosted Site continuously, twenty-four (24) hours per day, seven (7) days per week, including holidays, with the exception of reasonable hardware and software maintenance that must be performed on the Hosting Computer and/or the Hosted Site. i-on will use best efforts to schedule and perform such maintenance between the hours of 8pm and 8am Eastern Standard Time on weekdays, or during weekends. Under this Agreement, i-on will provide the following limited services for the Hosted Site: 1. connectivity to the Internet via a T1 (that may be shared by other Web sites) to a leading Internet backbone access provider such as UUNET, and reasonable efforts to maintain such connectivity with the phone company and the Internet backbone access provider; 2. use of the Hosting Computer (that may be shared by other Web sites) as described in this Agreement and maintenance required to keep such Hosting Computer in good working order; 3. physical space for the Hosting Computer at a facility that maintains proper environmental conditions in the area(s) where the Hosting Computer is located and maintains reasonable efforts to prevent unauthorized access to the physical location of the Hosting Computer; 4. an emergency electrical power backup system for the Hosting Computer; 5. up to 150 MB of mirrored computer storage on the Hosting Computer; 6. archival backups of such mirrored computer storage on a weekly basis; 2 7. off-site storage of such backups at separate facility than the location of the Hosting Computer; 8. use of the Microsoft Windows NT Server 4.0 or higher operating system software for the Hosting Computer and the Hosted Site; 9. use of the Microsoft Internet Information Service (IIS) 3.0 or higher Web server software for the Hosted Site (providing support for the HTTP Web protocol); 10. use of the Microsoft SQL Server 6.5 or higher database server software for the Hosted Site, within the boundaries of allocated computer storage, per #5 above; 11. access to the Hosted Site via the ftp protocol to an administrative account designated by the Customer for the Customer to maintain the Hosted Site's static content (such as HTML Web pages and computer graphics); 12. up to 10 mailboxes accessible via the POP3 mail protocol that are mapped to the Hosted Site's Internet address; 13. up to 1 hour per month of Web site administration services at no additional charge, limited to: requests for changes to ftp/e-mail users and passwords; requests for e-mail configuration changes; modification of mail aliases; changes to server MIME types; files restored from backup; answering questions about server-side scripts; ftp configuration changes; log file configuration changes; importing or exporting of database records; and consultation on site operation and administration. Additional Web site administration services will be billed at $200 per hour. 14. a monthly report of user activity on the Hosted Site. RESPONSIBILITIES OF THE CUSTOMER The Customer is responsible for paying i-on the recurring monthly fee in the amount of $450. The Customer is responsible for paying the recurring monthly fees by the 5th day of each month beginning in April 1, 1999. The Customer acknowledges that failure to pay such fees in a timely manner will result in the interruption or discontinuation of services for the Hosted Site. The Customer is solely responsible for all content on the Hosted Site, including but not limited to, HTML pages, graphics, sounds, animations, video clips, Java applets, client-site scripts such as JavaScript and VBScript features, ActiveX controls, and other files and/or executable components for use
"""

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