What do the laws say about Riyan's bizarre delivery

India all-rounder Riyan Parag was no-balled by the umpire after bizarrely delivering the ball from outside the pitch during the second India-Bangladesh T20I.

Riyan was bowling his first over during Bangladesh's chase, when he decided to use the width of the crease. Using a slingy action often seen from him in the IPL, he tossed the ball way behind the popping crease. The umpire immediately had a chat with the leg-umpire and sent it upstairs to check for a no-ball

The third umpire confirmed that Riyan had contravened Law 21 pertaining to fair delivery (the feet). The law says that:

"For a delivery to be fair in respect of the feet, in the delivery stride

21.5.1 the bowler’s back foot must land within and not touching the return crease appertaining to his/her stated mode of delivery.

21.5.2 the bowler’s front foot must land with some part of the foot, whether grounded or raised

- on the same side of the imaginary line joining the two middle stumps as the return crease described in 21.5.1, and

- behind the popping crease."