The grading system is based on age and compares each sheep against a standard for a perfect sheep (awarded maximum points). Points are awarded in three categories – appearance (markings), conformation and fleece. The most important scores are the conformation and fleece, with markings carrying less weight. A perfect sheep 12 months and younger has maximum scores of 4,4,4 whilst sheep 12 months to 18 months receive 5,5,5 and older sheep 6,6,6.
A full copy of the breed standard can be found at the following link.