The tagline must include the protected groups covered by OFCCP enforcement, but can include more. So if your staffing firm's tagline includes all the same protected groups in the client tag line, plus more protected groups, then the staffing firm's tagline will meet the OFCCP requirement. If the client name is mentioned in the advertisement, it is important that it be clear that both companies meet the obligation. (You need not post two tag lines, but make sure that the tag line is attributed to both companies.) Hope this helps.