[android-developers] Google Play Developer Program Policies - What happens when no advertising id is available on a device?

Hello everyone,

I am trying to understand the usage of Advertising Id forced by Google Policies by 1st of August. My question is regarding this:

The advertising identifier may only be used in accordance with these terms, including by any party that you may share it with in the course of your business. Beginning August 1st 2014, all updates and new apps uploaded to the Play Store must use the advertising ID (when available on a device) in lieu of any other device identifiers for any advertising purposes.

So if advertising id is not available on a device, can other identifiers be used like MAC address even after 1st of August?

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