Appointments to cadetships shall be made under regulations prescribed by the Secretary, who shall determine age limits, methods of selection of applicants, term of service as a cadet before graduation, and all other matters affecting such appointments. In the administration of this section, the Secretary shall take such action as may be necessary and appropriate to insure  that female individuals shall be eligible for appointment and admission to the Coast Guard Academy, and that the relevant standards required for appointment, admission, training, graduation, and commissioning of female individuals shall be the same as those required for male individuals, except for those minimum essential adjustments in such standards required because of physiological differences between male and female individuals.1