The State Examinations Commission has statutory responsibility for operational matters relating to the certificate examinations. It does not have responsibility for mock examinations; they are the sole responsibility of the school.
The State Examinations Commission operates a scheme of Reasonable Accommodations in the Certificate Examinations. Full details of the scheme are available from their website: www.examinations.ie/candidates/reasonableaccommodations.
In view of this I have forwarded your query to the State Examinations Commission for direct reply to you.