Prohibition on post office advocacy bars former Chairperson and Members from appearing, acting or pleading before the Appellate Tribunal. The amendment substitutes the pay provision, fixing an Apex scale for the Chairperson and a Higher Administrative Grade for Members, allows sitting High Court Judges appointed as Chairperson to receive High Court Judge salary, requires deduction of pension or retirement contributions from the salary of retired appointees, grants additional allowances aligned with Secretary and Additional Secretary levels, and inserts a post service bar preventing former Chairperson or Members from appearing, acting or pleading before the Appellate Tribunal.