Is it against rules of admob placing two ads on one app activity?

Is it against rules of admob placing two ads on one app activity?

The publisher IDs would be 开发者_运维问答equivalent.

If that is against the rules, could you put two ads on one activity but with different publisher IDs?

On Android

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From the AdMob help page Tips for Developers & Publishers

The number of ads on a single page should not exceed one if the ad is fixed to the screen top or screen bottom. If the page scrolls, there should be a maximum of one ad on the top and one ad on the bottom, and both ads should not appear on the same page.