[als0]

I don't interpret "Limit Ad Tracking" as "off".

As another comment mentioned, the only effective mechanism is to reset the identifier periodically. That's not a disable mechanism, though.

[weswpg]

> When Limit Ad Tracking is enabled on iOS 10 or later, the Advertising Identifier is replaced with a non-unique value of all zeros to prevent the serving of targeted ads. It is automatically reset to a new random identifier if you disable Limit Ad Tracking.

Shouldn't that be enough?