Order 21 Rule 138(c) of the High Court Rules is peremptory and remains in full force and effect, having not been abrogated by disuse. Where a special plea, exception or application to strike out has been filed, and parties have not consented within the prescribed 10 days to set down under Rule 138(a), and no party has set down within a further 4 days under Rule 138(b), the party must plead over to the merits within a further 4 days and the special plea, exception or application shall not be set down for hearing before trial. Non-compliance with this peremptory rule renders a matter not properly before the court. The court will not readily exercise its discretion under Rule 4(c) to condone flagrant and inexcusable breaches of peremptory procedural rules, particularly where the breach involves significant delay (such as applying for set down more than a year outside the prescribed period).