They are not mutually exclusive, but the best contractor for the Job runs a good chance of being excluded if they do not meet the criteria. I deal with shitty subcontractors based on union preference, mbe/dbe, requirements all of the time. The fukkin bs of the whole thing, most of them are guys who incorporate in their wives name. One's work and pricing should be what a competitive bid is judged on, not their skin color or the name on the business liscense.