GST AAR cannot rule on services provided during Service Tax Regime

In re Woodkraft India Limited (GST AAR Maharashtra) Q1&2 Whether in the facts & circumstances of case, applicant is liable to pay GST in respect of Tax Invoice No. 01 dated 25/06/2018 / R.A. Bill No 22 for Rs. 2,42,09,594/-, toward civil and interior work done of M/s Oil & Natural Gas Corporation Ltd. under provision CGST ACT?  If the ruling on above question is affirmative, kindly clarify rate of tax applicable thereon? Section 142(10) allows the levy tax on goods or services under GST Act, that are supplied only after appointed day i.e. 01/07/2017: in respect of RA Bill No. 22, ...