Even where it appears unlikely that there is a duty to give reasons for a decision, it may still be prudent for a decision-maker to consider providing reasons. Doing so will enable affected parties to understand the basis for the decision and may go towards demonstrating compliance with key administrative law principles, e.g. that relevant considerations were taken into account and that the decision is reasonable.
Where the decision-maker gives its reasons voluntarily (i.e. where it is not required to do so by law), those reasons must be as detailed as if they were required to be given; i.e. they must, as a minimum, be adequate and intelligible.