A form-only requirement that is usually ignored.    From Wordnet, Princeton University. 

Along with that, it's important that as we try to balance the budget, that we do not cut the necessary funding needed to do a real comprehensive study and come up with a short form-only style sampling, but make sure that we include in the test -- the long form as well -- because most of the education, the job activity information is on the long form.    From Wordnik.com.  [Multiservice Center Roundtable Discussion On Sampling] Reference