The document discusses registration requirements under the Goods and Services Tax (GST) law in India. It states that mandatory registration is required if aggregate turnover exceeds Rs. 20 lakhs for most states or Rs. 10 lakhs for special category states, or if the person holds a license under existing law or is engaged in reverse charge transactions. It outlines the registration process which involves filing Form REG-01 along with required documents like PAN and address proof. Upon approval, the GST Identification Number (GSTIN) is issued with a 15-digit format. The next session topic will be on input tax credit under GST.