The EJMO is a mock USAJMO with the following rules:
Two days, 4.5 hours to work on 3 proof-based problems per day;
Problems are scored manually and given a score between 0 and 7 inclusive (maximum score 42);
No calculators or protractors allowed.
Although USAJMO has a grade limit of 10th grade, the EJMO can be taken by any student in 12th grade or below.