Type of GST payable - Goods and Services Tax - GST

As per the decision of the Mumbai High Court which states in its order on Page 113:- The provisions of Section 13(8)(b) and Section 8(2) of the IGST Act are legal, valid and constitutional, provided that the provisions of Section 13(8)(b) and Section 8(2) are confined in their operation to the provisions of IGST Act only and the same cannot be made applicable for levy of tax on services under the CGST and MGST Acts . As per the provision of IGST Act , the GST payable is to be paid under IGST as per my understanding. Does the order confirm that the GST payable by the intermediary located in India for supplies made to its customer outside India is to be paid under IGST or does it confirm that the GST payable is under CGST+SGST ? Need valuable guidance in the matter