October 20, 2023

#DidYouKnow: Exceptions to Supervised Access
Did you know that under certain circumstances a person can’t access parts of a facility where controlled activities with security sensitive biological agents are authorized, even when accompanied and supervised?
Under section 23 of the Human Pathogens and Toxins Regulations, individuals without Human Pathogens and Toxins Act security clearance may access these areas if:
- they’re accompanied and supervised by someone with a valid security clearance
- the person accompanying and supervising them isn’t accompanying and supervising anyone else at the same time
Importantly, section 24 of the Human Pathogens and Toxins Regulations outlines situations where individuals cannot access controlled areas, even when accompanied and supervised. These situations include:
- when their Human Pathogens and Toxins Act security clearance has been suspended
- when they’ve previously been refused a security clearance
- when their security clearance has been revoked, and a new one hasn’t yet been issued
Last modified: Thursday, May 15, 2025 4:11 PM