Up to three ad units may be displayed on each page. A maximum of two Google AdSense for search boxes may be placed on a page. Up to three link units may also be placed on each page.
AdSense for search results pages may show only a single ad link unit in addition to the ads Google serves with the search results. No other ads may be displayed on your search results page. No Google ad or Google search box may be displayed in a pop-up, pop-under, or in an email. Elements on a page must not obscure any portion of the ads. No Google ad may be placed on any non-content-based pages. No Google ad may be placed on pages published specifically for the purpose of showing ads, whether or not the page content is relevant.