How much power does Delhi Police commissioner have to detain people under NSA?

A recent notification issued by the Lieutenant Governor of Delhi gave powers to the police commissioner to detain individuals under the National Security Act. The order by the LG, Anil Baijal, was an important one in the view of the protests that have rocked Delhi and most of them turning violent. Let us take a look at the significance of the order and what it states, as Simplified by Ajay Joseph.