Definition(s)
To Remain Effective In An Emergency
To remain effective in an emergency, arrangements and plant should, so far as is reasonably practicable, be capable of remaining operational in an emergency, for as long as they are needed to fulfil their functions, taking into account the conditions to which they may be exposed.
Source: Prevention of Fire and Explosion, and Emergency Response on Offshore Installations, Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, Approved Code of Practice and guidance (UK HSE L65), Second Edition, 1997. Regulatory Guidance