Proposals for amateur time were stringently reviewed by a committee of amateur astronomers, and time was awarded only to proposals that were deemed to have genuine scientific merit, did not duplicate proposals made by professionals, and required the unique capabilities of the space telescope.
Amatööride avaldused vaatas üle amatöörastronoomide komitee, mis andis aja ainult ettepanekutele, mis olid tõelise teadusliku väärtusega, ei kopeerinud professionaalide ettepanekuid ning vajasid kosmoseteleskoobi ainulaadseid võimalusi.