Conflict between the GST provisions:

RAHUL SINGH (Student CA Final ) (69 Points)

24 June 2017  
As per GST Act the existing registered dealers are compulsorily required to migrate to GST . But the said act also says that those dealers whose value of taxable supplies doesn't exceed 20 Lacs are not required to obtain registration under GST.
Suppose an existing registered dealer having annual turnover of 15 lacs.
On the one hand he has to mandatorily migrate to GST which is a prerequisite for registration under GST and on the other hand he has not to obtain the registration as his annual turnover doesn't exceed 20 Lacs.
Please clear the above issue by giving clear reference of relevant provisions.