Union of Clerical, Administrative and Supervisory Employees, National Workers Union, Bustamante Industrial Trade Union ('The Unions') v. The Industrial Disputes Tribunal and Jamaica Public Service Co. Ltd.

Judicial Review-Error of law-Whether error of law need to be 'on face of record'-Inferior tribunal and presumption of regularity-Failure of majority members of inferior tribunal to provide fulsome reasons for award made-Interpretation of contractual agreement-Parties' discussions during contractual negotiations-Parties' expressions of understanding of draft agreement as expressed during contractual negotiations-Parties' expressions of respective interpretations of contractual agreement after agreement reached-Implied terms-Reference to custom and practice in interpretation of contracts