Your question is quite complex as there are many variables to consider when answering it. Even so, you should reference this article in The OFCCP Digest as it will help clear-up many of your questions.
You can use this OFCCP audit checklist to ensure you're doing what is required to maintain OFCCP's regulations including VEVRAA, Section 503, and EO 11246. Or request a demo to streamline your compliance and recruiting efforts.