Under the revised regulations, every operative entering a designated containment zone must wear a fit-tested respiratory protective device for the entire duration of their shift, irrespective of the concentration recorded at the perimeter monitor. Operatives who are confined exclusively to the remotely-operated control gallery, from which contaminated atmospheres are physically excluded, are exempted from this respirator obligation. Because that exemption presupposes an uncompromised barrier, any operative covered by it forfeits the exemption immediately should the gallery seal be breached. The compliance officer reconciles the attendance log against the monitoring record at the conclusion of each operating period.
According to the passage, which of the following is correct about the respirator obligation in the containment zone?