Sole Proprietor is a single man organization, wherein the proprietor is vested with all the rights and powers, similarly he alone is liable for all kinds of liabilities what so ever, with no limitation. In the eventuality of defaults by the proprietorship the personal properties of the proprietor is attached to meet the liabilities. There is no specific law which regulates this kind of the business.
Since the proprietorship is itself not distinguishable from its owner hence there is no registration or approval is required to start a proprietorship business. However following are the registrations which is needed based on the situation of the firm