I assume that the Deputy is referring to changes arising from the Haddington Road Agreement involving the Supervision and Substitution Scheme in 2013 and 2014.
Circular 33/2013 (Supervision Scheme in Primary Schools) provides that from the beginning of the 2013/14 school year, the hours to be provided by teachers under the revised Supervision and Substitution Scheme were mandatory and were to be used to cover all uncertified sick leave absences (subject to appropriate alleviation measures in relation to multiple absences particularly in small schools) and from the commencement of the 2014/2015 school year to cover the first day of force majeure leave and illness in family leave. Similar provisions in relation to Supervision and Substitution were set out in Circular 06/2014 in relation to Post Primary Schools.
The provisions that apply to teachers in respect of certified and self-certified sick leave absences are set out in Chapter 1, Paragraph 5 of Circular 54/2019. The circulars can be accessed on my Department website.
The full information in relation to estimating the cost of substitution cover for absences covered by the supervision and substitution scheme as requested by the Deputy is not available in my Department. I will arrange for the information that is available to be forwarded direct to him.
The information in relation to teachers employed in Education and Training Boards would have to be obtained by the Deputy from the individual Boards.