When is a MWCB halt triggered?

Level 1: If the S&P 500 drops 7%, trading will pause for 15 minutes
Level 2: If the S&P 500 declines 13%, trading will again pause for 15 minutes
Level 3: If the S&P 500 falls 20%, trading would halt for the remainder of the day.
A Level 1 and Level 2 breach can be triggered between 9:30 a.m. ET and 3:25 p.m. ET