Advocates appeared:
For the Petitioner(s): Mr. N. Venkataraman, ASG Mr. Balbir Singh, ASG Mr. Mukesh Kumar Maroria, AOR Mr. Shyam Gopal, Adv. Ms. Binu Tamta, Adv. Mr. Shantanu Sharma, Adv. Ms. Chinmayee Chandra, Adv. Mr. B. Krishna Prasad, AOR Mr. B. V. Balaram Das, AOR Mr. Arvind Datar, Sr. Adv. Mr. Harish Bindhumadavan, Adv. Mr. Pawan Shree Agrawal, AOR Mr. Rahul Unnikrishnan, Adv. Mr. Ashwini Chandrashekharan, Adv. Ms. Sharyashree Thyagarajan, Adv. Mr. Manoharan Ellappan, Adv. Mr. Sujit Ghosh, Adv. Mr. Krishna Rao, Adv. Mr. Ajinka Tiwari, Adv. Mr. Nikilesh Ramachandran, AOR Mr. V. Sridharan, Sr. Adv. Mr. Sriram Sridharan, Adv. Mr. Anand Nainavati, Adv. Mr. Aditya Bhattacharya, Adv. Ms. Apeksha Mehta, Adv. Mr. Somesh Jain, Adv. Mr. Nalin Bajaj, Adv. Mr. Kunal Kapoor, Adv. Ms. Mounica Kasturi, Adv. Ms. Charanya Lakshmikumaran, AOR Mr. Ankit Yadav, AOR Ms. Veena Kamath, Adv.
For the Respondent(s): Mr. V. Sridharan, Sr. Adv. Mr. Sriram Sridharan, Adv. Mr. Anand Nainavati, Adv. Mr. Aditya Bhattacharya, Adv. Ms. Apeksha Mehta, Adv. Mr. Somesh Jain, Adv. Mr. Nalin Bajaj, Adv. Mr. Kunal Kapoor, Adv. Ms. Mounica Kasturi, Adv. Ms. Charanya Lakshmikumaran, AOR Mr. Arvind Datar, Sr. Adv. Mr. Harish Bindhumadavan, Adv. Mr. Pawan Shree Agrawal, AOR Mr. Rahul Unnikrishnan, Adv. Mr. Ashwini Chandrashekharan, Adv. Ms. Sharyashree Thyagarajan, Adv. Mr. Manoharan Ellappan, Adv. Mr. Uchit Sheth, Adv. Mr. Santosh Krishnan, AOR Mr. Mukesh Kumar Maroria, AOR Mr. Amit Anand Tiwari, AAG Dr. Joseph Aristotle S., Adv. Mr. Saaketh Kasibhatla, Adv. Ms. Preeti Singh, Adv. Mr. Joseph Pookkatt, Adv. Mr. Prashant Kumar, Adv. Mr. Nilesh Sharma, Adv. Mr. Dhawesh Pahuja, Adv. M/s. Ap & J Chambers Dr. Avinash Poddar, Adv. Mr. Anant Kumar Vatsya, Adv. Mr. Ashish Kumar Sinha, Adv. Mr. Devendra Singh, AOR Mr. Naresh Thacker, Adv. Mr. Kumar Visalaksh, Adv. Mr. Hardik Modh, Adv. Mr. Udit Jain, Adv. Mr. Amit Laddha, Adv. Mr. Abhishek Vikas, AOR
(Intervenor) : Mr. Arvind Datar, Sr. Adv. Mr. Mahesh Agarwal, Adv. Mr. P.R. Renganath, Adv. Mr. Rohan Talwar, Adv. Mr. E. C. Agrawala, AOR Mr. Vinay Shraff, Adv. Mr. Ravi Bharuka, AOR Mr. Ankit Agarwal, Adv. Mr. Sandeep Goyal, Adv. Mr. Pawan Shree Agrawal, AOR Mr. G. Natarajan, Adv. Mr. Kartik Jindal, Adv. Mr. Anant Gautam Adv. Mr. Nipun Sharma, Adv Mr. Madhur Tewatia, Adv. Mr. Rajesh Kumar Gautam, AOR Mr. V. N. Raghupathy, AOR Mr. Md. Apzal Ansari, Adv. Mr. M. Yogesh Kanna, AOR

The ratio of the decision primarily centers on the interpretation of Section 54(3) of the CGST Act and the scope of the refund of unutilized input tax credit (ITC). The Court held that the statutory provision and its provisos should be understood as restrictions rather than mere conditions of eligibility, thereby limiting the refund to specific scenarios explicitly provided therein. Specifically, the Court emphasized that the refund is permissible only in cases where the credit has accumulated due to zero-rated supplies without payment of tax or due to an inverted duty structure where the rate of tax on inputs exceeds that on output supplies.

The Court rejected the broad interpretation that ITC on input services should be included in the refund calculation, affirming that the legislative intent restricts refunds to input goods only. The provisions and rules framing the refund mechanism are to be read in harmony with this legislative intent, and any delegated legislation or formula that restricts the scope of refund beyond what is explicitly provided is ultra vires.

Furthermore, the Court underscored that refund is a statutory right, not a constitutional one, and that the legislature's policy choices, including classifications and restrictions, are within its domain. The Court also clarified that the formula prescribed in rules, though imperfect, falls within the legislative and rule-making powers, and anomalies or inequities therein do not automatically invalidate the rule, provided it is not arbitrary or violative of constitutional principles.

In conclusion, the Court affirmed that the legislative scheme confines the refund of unutilized ITC to specific situations, and the legislative restrictions—such as limiting refunds to input goods only—must be upheld. The Court disapproved of extending the refund to input services in the context of inverted duty structures, as such an extension is not supported by the statutory language and would infringe upon the legislative intent and constitutional boundaries.