In this scenario, tags are loaded only after consent (positive or negative). If the user consent status is available because the user has already given consent through the CMP, the user consent status is passed to the tag. If the user consent status is not available yet (the CMP is still displayed), the tag is loaded only after consent regardless of the status.
The behavior may vary depending on the type of tags and vendors. Please contact your vendors if the behavior you are looking for is not the one currently applied.
Vendors that block the tag by default
You have nothing to add on your side. The current consent state will be sent automatically on each request.
There is no clear list of vendors that automatically collect the user consent status from AMP. They can usually be identified through their AMP configuration by checking if they reference the consentState parameter.
If you want to send the bid request regardless of the consent state, you can add a sendRegardlessOfConsentState in the RTC config JSON object and set it to true. Even if the consent is rejected or dismissed, a call will be made to the vendor. It is particularly useful when the vendor support the IAB consent string. For more information related to the support of the IAB consent string, please contact your vendors.
To see if the vendor is able to receive the consent state or the consent string, you can take a look at this list and see if the macros CONSENT_STATE or CONSENT_STRING are available in their configuration.
Example of amp-ad with the type DoubleClick and a RTC Config with APS.
Send RTC call regardless of consent state
This option allows you to send the bid requests of the vendors present in the RTC configuration regardless of the consent state (accept/reject/dismiss). By default, the bid request is only sent if the user accept the consent.
If you want to unblock an amp-ad when a consent (positive/negative) is given, you can add the _till_responded value to the data-block-on-consent attribute.
If you want to unblock any other tags supporting the data-block-on-consent attribute when a consent (positive/negative) is given, you can add the _till_responded value to the data-block-on-consent attribute.
Summary
Configuration
When is the tag loaded
Default (no data-block-on-consent)
Tag is loaded on page load.
With data-block-on-consent="_till_responded"
Tag is loaded once a consent (positive or negative) is given.