Rcm on small bills gst

Sir!

My-self working in govt. company as Manager accounts. Every month we are giving adavnces around 10000 to 15000 to our enginnering officer.. At the month end they are submitting acounts of expenditure consisting of bills amounting rs. 500 to 1500 in range.purchase made from unregistered vendor of GST.

Recently one amendment has come that RCM is suspended upto 31.03.2018. 

Please guide me whether I have to pay GST on these bills as per RCM or upto 31.03.2018 GST on , RCM need not to be paid.

Thanks and regards