A mega rehearsal was conducted tonight in the Central Hall of Parliament ahead of the historic launch of the Goods and Services Tax (GST) at midnight on 30th of June. <br/>'<br/>Official sources said, the mock drill was conducted around 10 pm to ensure that all things were in place during the main event. They said, the concerning officers from various departments including those from the finance ministry attended the rehearsal event.<br/>'<br/>The event to launch the GST will be held in the circular-shaped Central Hall, which witnessed the function to mark 50 years of Independence. It will be attended by President Pranab Mukherjee, Prime Minister Narendra Modi, Finance Minister Arun Jaitley and a host of senior ministers and bureaucrats, among others.<br/>'''''''<br/>