I heard some where that it is against the absence rules to place adds in the header and footer of web pages is this true?
you can place ad in header and footer, no problem with that. you can see ad placed in this forum in header. that is very much ok. but you can not place ad just under the page title.
Yes, adsense ads immediately under the page title is no! no! & no! I'm a great believer in this after one of my major sites no longer being served Adsense ads because of this tos infringement.