If their offerings materially change:

Google advertisers with the Gambling and games certification must recertify or stop relying on the certification to advertise products in scope of the Gambling and games policy if a material change has occurred since the certification application was submitted. 

Failure to do so will be considered a violation of the Google Ads Circumventing Systems policy, Google said.

Material changes include, but are not limited to:

• Changes to advertiser’s product offerings which are inconsistent with any license or approvals provided to Google
• Changes to advertiser’s compliance with applicable regulations
• Changes to advertiser’s licensure or other compliance with Google’s Gambling and games certification requirements

Google said that changes to an advertiser’s address or payment methods are not considered material for purposes of this Gambling and games recertification requirement.