There's no pre-defined way. You need to have a negotiation with RM/ICICI team to get it done. Usually if you're holding a good relationship value, you'll get it
I contacted on Twitter to have LTF Rubyx/Sapphiro. Then got a call from ICICI team and they shared LTF criteria. Min 1L take home salary is for Rubyx and 2L for Sapphiro.