(1) A safety case must contain a formal safety assessment.
(2) The formal safety assessment for a facility must be consistent with the facility description for the facility and must provide—
(a) a description of the methodology used and investigations undertaken for the formal safety assessment; and
(b) an identification of hazards having the potential to cause a gas incident; and
(c) a systematic assessment of risk, including the likelihood and consequences of a gas incident; and
(d) a description of technical and other measures undertaken, or to be undertaken, to minimise that risk as far as practicable.