What is the timelines for establishment of the Appellate Tribunal under the Act?

As per section 43 of the Act, the Appellate Tribunal is required to be established within 1 year of of the commencement of section 43. As section 43 has been notified with effect from 1st May, 2016, the Appellate Tribunal is required to be established maximum by 30th April, 2017.
However, for speedy implementation of the Act, section 43 empowers the ‘appropriate Government’ to designate an existing Appellate Tribunal (under any other law in force) to function as an Appellate Tribunal under the Act.