DPNs don’t wait. You’re under a strict 21-day clock from the date of issue, and...

https://mega-wiki.win/index.php/What_does_%27active_engagement%27_look_like_for_the_DPN_reasonable_steps_defence%3F

DPNs don’t wait. You’re under a strict 21-day clock from the date of issue, and distinguishing between a lockdown or non-lockdown notice changes your approach. We’ve broken down the essential steps to take, so you can triage fast and keep options open.