Appellate Tribunal sitting hours are fixed ordinarily, with flexibility to extend proceedings as deemed fit. The Appellate Tribunal is ordinarily required to sit from 10.30 a.m. to 1.30 p.m. and from 2.30 p.m. to 4.30 p.m., subject to any order made by the President. The rule also preserves the Tribunal's ability to extend its sitting hours as it deems fit, allowing flexibility beyond the ordinary schedule.