estimated. A student's UAI was given as a number between 30 and 100. Students who receive 30 or below receive a 'pink slip' which informed them that they received below 30, though these were rare due to most of the estimated Year 10 cohort's marks falling into this range. UAIs of 100 were extremely rare and were only achieved by a few students (generally, about 20 out of almost 66,000) every year. The organisation responsible for administering the UAI, was the Universities Admissions Centre (UAC), who scaled all subjects using mathematical formulae to try to ensure equity of marks across subjects. To be eligible for the UAI as well as the HSC or ACT Year 12 Certificate, a student must have complied with additional rules set by the Board of Studies in New South Wales or the Board of Senior Secondary Studies in the Australian Capital Territory. Calculation in NSW To calculate the UAI, the UAC used the raw exam marks of the HSC and the moderated assessment mark. The assessment mark was obtained from the internal school examinations a student sat over the last term of Year 11 and the three terms of Year 12. The school marks were sent to the UAC from the Board of Studies, and from these students were ranked from first to last. The student ranked first was then assigned a moderated assessment mark equal to the highest examination mark scored by that group of students, regardless of who scored it, and similarly the student ranked last would receive the lowest examination mark. The rest of the students had their assessment marks moderated between these two values, with the proportional difference between the marks remaining the same (for instance, the gap of 10 between two marks spread over a range of 20% would be halved if the range was further halved to 10%). The student who came first in the subject was then assigned the maximum mark, normally 50.0 on a one unit basis but may have changed with scaling. Following that all students who sat the course had a scaled mark calculated based on an estimate of what each student would have achieved had they sat that course. This was repeated for all of a student's units. The student's two best English units were added along with their next best eight units, which may have included further English units, to give an aggregate