Who are the persons liable to take a Registration under the Model GST Law?

Any supplier who carries on any business at any
place in India and whose aggregate turnover exceeds
threshold limit as prescribed in a year is liable to get
himself registered. However, certain categories of persons
mentioned in Schedule III of MGL are liable to be registered
irrespective of this threshold.
An agriculturist shall not be considered as a taxable person
and shall not be liable to take registration. (As per section
9 (1))