5.—(1) The duty holder shall perform, and thereafter repeat as often as may be appropriate a process (in this regulation called “an assessment”) described in paragraph (2) in relation to the installation.
(2) An assessment shall consist of—
(a)the identification of the various events which could give rise to—
(i)a major accident involving fire or explosion; or
(ii)the need (whether or not by reason of fire or explosion) for evacuation, escape or rescue to avoid or minimise a major accident;
(b)the evaluation of the likelihood and consequences of such events;
(c)the establishment of appropriate standards of performance to be attained by anything provided by measures for—
(i)ensuring effective evacuation, escape, recovery and rescue to avoid or minimise a major accident; and
(ii)otherwise protecting persons from a major accident involving fire or explosion; and
(d)the selection of appropriate measures.
(3) The duty holder shall—
(a)record the assessment (including each repetition of it);
(b)keep the record at an address in Great Britain; and
(c)notify the Executive of such address.