Buildings or portions thereof shall be considered substandard when they are not provided with the fire-resistive construction or fire-extinguishing systems or equipment required by this chapter, except those buildings or portions thereof that conformed with all applicable laws at the time of their construction and whose fire-resistive integrity and fire-extinguishing systems or equipment have been adequately maintained and improved in relation to any increase in occupant load, alteration or addition, or any change in occupancy.
Penalty, see § 116.999