The binding legal principles established are: (1) Under Section 13(1) of the Commercial Premises (Rent) Regulations SI 676/83, the Rent Board has authority to fix an effective date for determined fair rent, which may be backdated to the date the application was received by the board; (2) Notification of a Rent Board determination by the Secretary under Section 14 of the regulations is valid and binding regardless of subsequent events affecting the secretary's employment; (3) To resist summary judgment, a defendant must allege material facts which, if established at trial, would entitle them to succeed in their defence, with sufficient clarity and completeness to demonstrate a bona fide defence (applying Rex v Rhodian Investments Trust and Jena v Nechipote); (4) Bald, vague and sketchy allegations without supporting material facts do not constitute a bona fide defence; (5) Abuse of court process to delay enforcement of just claims, particularly in commercial tenancy cases, warrants punitive costs on an attorney-client scale.