Telecom Regulatory Authority Of India - Subsection
Section 20(2)(b) in The Telecom Commercial Communications Customer Preference Regulations, 2010
(b)every Originating Access Provider shall, before allotting telecom resources to a telemarketer for sending Transactional Message, enter into agreement with such person in accordance with the procedure specified in Schedule V to these regulations and ensure that no telemarketing SMS is sent through the telecom resources allotted for sending Transactional Message;