There are currently seven trustees, one each from the Church of Scotland, Roman Catholic Church and Scottish Episcopal Church (the appointing members) and three others representing the other six Member Churches of ACTS (the electing members).

There is also a Treasurer and the trustee body may co-opt a further three people to be Trustee body if desired. The Convener and Vice Convenership of the Trustee body are selected by the appointing and electing members on a rotational basis.