Whether the new rules (imposing the restriction of 20% on input tax credit (‘ITC’)) could be implemented without notifying Section 43(A) of the CGST Act? Whether amendment in Rule 36 of the CGST Rules, 2017 could be brought about, leaving the recipient at the whims of the supplier, thereby violating a person of its substantive right and overriding Article 14 and Article 19 of the Constitution?