What are the sources of trademark laws in business?

The national statues i.e., The Trade Marks Act, 1999 and rules made are as under:

• International multilateral convention.
• National bilateral treaty.
• Regional treaty.
• Decision of the courts.
• Office practice reduced in Manuals and guidelines and rulings of the Courts.
• Decision of Intellectual Appellate Board.
• Text books written by academician ad professional experts.