Time of supply rule: small registered persons must pay state tax at time of supply and file returns. Designates registered persons whose aggregate turnover in the preceding financial year did not exceed one crore and fifty lakh rupees, or whose turnover in the year of registration is likely to be less than that amount, and who did not opt for the composition levy, as a class required to pay State tax on the outward supply of goods at the time of supply and to furnish details and returns as provided in Chapter IX of the Act, with payment periods as specified in the Act.