Enquiry Centre - Addition / Alteration - Voluntary upgrade of existing fire alarm system in this existing residential building on this site. Note: This FAS upgrade is limited only to the replacement of the control unit. No work is permitted in elevator recall system. This permit has been issued based on item #3 of Bulletin 2006-004-BU/EL. OK for SIPS with no drawings as per W.Wong, September 6, 2017. Energy Upgrade Exempt: Voluntary Upgrade.