From what I've seen, it's pretty universal for contracts to individual freelancers like this to have an explicit "no subs" clause or at least require prior appr

From what I've seen, it's pretty universal for contracts to individual freelancers like this to have an explicit "no subs" clause or at least require prior approval of specific subcontractors. I guess you could lie, or try to negotiate your way out of it in some cases... but I wouldn't count on that at scale.