http://www.abrsm.org/?page=exams/regs/international/2007/examGrades.html
Exam Regulations 2007/2008
1 Grades of Examination
a There are eight grades of examination, numbered progressively in
order of difficulty from 1 to 8.
b Candidates may be entered in any grade irrespective of age, and
without previously having taken any other grade in the same
subject.
c A candidate may enter for only one grade of Theory at a
time.
d Candidates for Practical Grades 6, 7
and 8 must already have passed one of the following
qualifications:
ABRSM: Grade 5 (or above) in Theory, Practical Musicianship or solo
Jazz subject
Trinity Guildhall, LCM, AMEB, UNISA: Grade 5 (or above) in
Theory
This must have been passed before the last date of entry for the
Practical examination.
