(a) The dispute is in the opinion of the SRO frivolous or vexatious;

(b) The matter has previously been considered or excluded by a former scheme, but has not been adjudicated upon under paragraph DRA-2.1.22 and an award made under Chapter 3 (unless material new evidence likely to affect the outcome has subsequently become available).
For the avoidance of doubt, all cases which have been settled as set out in rule DRA-2.1.9 (f) or for which an award has been made by the adjudicators must be dismissed;

(c) There are other compelling reasons why it is inappropriate for the dispute to be dealt with by the SRO; or

(d) The complainant is not cooperating.