• HTML code cannot exceed 3k.
• 2 images maximum, total file size of images cannot exceed 20k.
• Client-side imagemaps are acceptable and must be provided by the client.
• Forms tags in HTML code must use "get" in the method.
• CGIs referenced in the HTML code must be active at the time of ad submission for validating/testing the ad HTML code, and able to handle the traffic load. Ads with CGIs which are not active and/or cannot handle the projected traffic will not be accepted.

• Source File: All SWF file should be submitted with the source file (fla) for testing and scheduling
• Break apart all text into image.
• The frame rate for this ad unit may not exceed 24 frames per second. 18 frames per second is preferred. For more information, please read "SWFs with High Frame Rates May Slow System Performance"
• The clickTAG must be attached to a button object and called on Release. (refer to Click Command Rule)
• Button layer should be added on visible floating object and regular banner area only
• Flash banners must be published in flash version 5, 6, 7 or 8
• Recommendation: Using Actionscript for your animations can keep the file size down. Learn more about it from Macromedia
• Recommendation: Do not base on the scene color as the flash background color. Adding graphic as the background ensure the correctness of the creative

• Linking URLs must be domain name based and cannot be the IP address (i.e., http://207.123.456.78 )

• Advertisements must comply with Yahoo's Ad Formats and Specifications, non-compliance will cause delay of the launch.
• Standard creative must be submitted to Customer's designated Sales Coordinator 3 business days (ie, Mondays to Fridays excluding bank holidays) prior to launch date, otherwise launch may be delayed. Rich media advertisements must be submitted 5 business days prior to launch date to enable thorough testing. Customer must contact its Sales Representative of Yahoo for additional details.
• Creative submissions should include the following:
  • Name of advertiser
  • Number of the Insertion Order
  • Detailed trafficking instructions (If more than one URL)
  • Creative files
  • Alternate text (if applicable)
  • Linking URL
  • Third party tags (if applicable)
  • Backup image (for flash or rich media format creative)
• Third party tags must be live at the time of submission to enable thorough testing before launch.
• For different tiers of rich media, preparation time are as following
• For tier 1, 4 full business days is required.
• For tier 2, 5 full business days is required.
• For tier 3, Preparation time evaluated in case by case.
• detail here

• Rescheduling request must be in writing and sent by fax or email to the responsible Sales Representative and Sales Coordinator of Yahoo at least 5 business days prior to the scheduled date.
• Yahoo reserves the right to charge 50% of the booking cost for late notice of rescheduling.

• Advertisements must not mislead viewers, eg, they may not mimic or resemble Windows/Mac/Unix dialogue boxes, error messages or the like.
• Advertisements must not resemble Yahoo's content.
• Advertisements must not contain graphics that simulate interactivity (ie, drop down menus or search boxes etc) without that functionality actually existing.
• Advertisements must not mimic news headlines in design, tone, third person sentence structure or topic.
• No third party serving of HTML/JavaScript code is allowed except as approved by Yahoo. Third party servers authorized by Yahoo may only serve the alternate images and/or the click-through URLs on Yahoo's homepage.
• All advertisements must be pre-approved by Yahoo before publication. Cookies may not be set on the Yahoo network except by parties who have signed a third party ad serving agreement with Yahoo.
• Yahoo reserves the right to preserve the user experience of its sites and to remove any advertisement which is considered by Yahoo to be annoying and/or harmful to its users.
• Yahoo will test all common technologies used for advertisements creative in its laboratory. However, it is understood and agreed that certain ad technologies sometimes cannot be shown in certain computers due to a variety of reasons which are beyond Yahoo's control, eg, configuration of the computer and/or the browser, security settings and availability of the necessary software etc, in which case Yahoo will not be responsible. In addition, Yahoo will not show a Rich media advertisement for any browsers/OS/platform if the technology used in the advertisement can cause system instability or crashes.
• Some ad format requires frequency capping to avoid generating negative experience to users. Frequency capping requirement will be differ between ad units.

Yahoo allows Customer to lawfully and fairly collect personal information, subject to Yahoo's approval on a case-by-case basis, Customer must make changes to the ad units or include additional disclosure as requested by Yahoo. The following conditions also apply:

1. Advertisements must clearly identify Customer as collector of the personal information.
2. A direct link to Customer's privacy policy, adjacent to the submit button, must be provided.
3. Customer's privacy policy must comply with all lawful requirements.
4. The purpose of collecting the personal information must be stated.