Here[1] is a PDF from less than two years ago that gets into detail, with a number of examples. [1] https://brightfuturejobs.nationbuilder.com/assets/pages/15/

Here[1] is a PDF from less than two years ago that gets into detail, with a number of examples. [1] https://brightfuturejobs.nationbuilder.com/assets/pages/15/No_Americans_Need_Apply_-_100_Help_Wanted_Ads_Exclude.pdf https://brightfuturejobs.nationbuilder.com/assets/pages/15/N...