Compensation for Delayed possession

Hi, I have purchased an under construction property in maharashtra in 2014, before MhaRERA came into picture. Back then as everybody knows that builders used to have agreement in their favour only. If i am not wrong then agreement used to be 90% in builder favour. In my scenario, agreement was created like if i delay payment then i'll be charged 20-24% and in case builder delays possession, he will be chaeged 1500 rs per year. So, suppose if my agreement date is about to expire, and there is no chance that builder gives possession in next 18 months also. Can anybody suggest please what Rera says in that regard? I had read mharera clause 18.3 which i feel states compensation will be as per rera. If builder gives late possession. Can anybody please revert, what are my rights as per rera and what compensation i'll be eligible for? Request to revert ASAP, and thanks in advance. Any more suggestion that i am unable to think and suggested in this forum are also welcomed. So, kindly suggest. Thanks,