6.—(1) Sub-paragraph (2) applies to an individual who—
(a)before 1st April 2013 was appointed under regulation 5(1) of the 1999 Regulations as an investigating officer in relation to a case in relation to which those Regulations continue to have effect by virtue of paragraph 3; and
(b)is a transferred senior officer.
(2) An individual to whom this sub-paragraph applies is to continue to be the investigating officer in relation to the case in relation to which that individual’s appointment was made.
(3) Sub-paragraphs (4) and (5) apply where an individual appointed before 1st April 2013 to act as the investigating officer in relation to a case in relation to which the 1999 Regulations continue to have effect by virtue of paragraph 3 is not a transferred senior officer.
(4) Where this sub-paragraph applies, the Authority must, in accordance with regulation 5 of the 1999 Regulations, appoint, or make arrangements for the appointment of, an individual to replace the individual mentioned in sub-paragraph (3) as investigating officer.
(5) Anything done before 1st April 2013 by or in relation to an investigating officer who is not a transferred senior officer is, on and after that date, to be treated as having been done by or in relation to the individual appointed to replace that investigating officer.