Secure Third-Party Tags: All third party tags must be secure Max CPU: Ad not to exceed 30% CPU usage during host-initiated execution. Max number of host-initiated file requests: Ad not to exceed 15 file requests during initial file load and host-initiated subload. Unlimited file requests allowed after user-interaction. Audio: Must be user-initiated. To allow for audio initiation in videos without player controls, a control may be included for user to initiate audio. Flash not accepted: Rich media ads must be built using HTML5. Third-Party Tags: HTML5 tags must be served via approved third-party, delivered via Javascript or iframe, include backup image and have z-index set to 0. White backgrounds on ads: If ad has white background, 1px gray border required. Z-Index: Z-Index on all rich media HTML5 creatives must be set to 0.