680.A decision notice must be in writing and must set out the reasons for the course of action.  It also requires the Authority to explain a right of access to Authority material under section 394 and rights to refer the case to the Tribunal (including the procedure for doing so).
681.If a decision notice follows a warning notice, the action proposed in it must be action the Authority has powers to take under the same Part of the Act.  The Authority can issue a further decision notice altering the action proposed in an earlier notice, but only with the consent of the person concerned.
Commentary on Sections Part Xxvi: Notices Section 388: Decision notices