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Technical Guidelines for URLs

• The URL may not contain the following:
  • Non-printing characters (ASCII value 0-31)
  • Spaces (ASCII value 32)
  • International characters (ASCII value 127-255)
  • Foreign characters: @, !, $, ^, *, (, ), ~, (ASCII values 64, 33, 36, 94, 42, 40, 41, 126, 96)
    
• The URL itself must not be more than 255 characters long.
  
• The URL should not use JavaScript or other scripts to load a substitute URL.
  
• No more than one level of redirection should be required to retrieve the page.
  
• The URL must resolve to an operational Web page. It may not generate error messages such as "File not Found."
  
• The Web page must be accessible and not require a username, password, cookie or other authentication in order to access.
  
• The web page must be accessible to our partner's spider and must not reside on a secure server (eg https://), use any blocking technologies (such as robots.txt files), or require a username, password, cookie or other authentication.
  
• The Web page must permit so called "spidering" technology, such as not excluding the URL by use of a "robots.txt" file.
  
• The Web page must contain visible text (not graphics only).