This document provides a comprehensive summary of Section 24 of the GST Act, which outlines compulsory registration requirements. It details who needs to register mandatorily, including inter-state suppliers, casual taxable persons, recipients under Reverse Charge Mechanism (RCM), non-resident taxable persons, agents, input service distributors, and e-commerce operators. The summary clarifies thresholds, conditions, and exceptions, making it a vital resource for businesses to ensure compliance with GST regulations.