GST for EPC contracts

Sanjay Singhal (6 Points)

28 March 2017  
For turnkey contracts under GOI schemes there are two types of works. Namely a) Supply of equipment and b) Erection. I want to know if there would be two GST slabs in the same contract.
The above is case 1. In certain states the above two factors are quoted and awarded together. How can one guess what to quote for future tenders and what will happen to the ongoing one. The conditions of contracts does not permit any compensation for change in taxes.