USPAP makes
you responsible for the Scope of the Work, not the client. USPAP makes you responsible for the Scope of the Work per the Intended Use, and your scope of the work can not be so limited by the client as to make your opinions not credible for the INTENDED USE, not for the client's understanding, but for their INTENDED USE which is to lend money, that ultimately will be backed up by tax payers in some form or fashion, should the loan go belly up.
Wether the institution ensures the scope of the work is appropriate or not, it is still up to the APPRAISER to DETERMINE THE APPROPRIATE SCOPE OF THE WORK FOR THE INTENDED USE, not the institution.