(a) Fixed sensors must have audio and visual alarms in the control room and audio alarms nearby.
(b) Fixed sensors that continuously monitor for LNG vapors must--
(1) Be in each enclosed area where vapor or gas may accumulate; and
(2) Meet Section 9-4 of NFPA 59A.
(c) Fixed sensors that continuously monitor for flame, heat, or products of combustion must--
(1) Be in each enclosed or covered Class I, Division 1, hazardous location defined in Section 500-5(a) of NFPA 70 and each area in which flammable or combustible material is stored; and
(2) Meet Section 9-4 of NFPA 59A.