(1) For the heading to item 1 of Schedule 3 to the Principal Regulations substitute " Safety interface agreements ".
(2) In Schedule 3 to the Principal Regulations—
(a) in item 1.1, for "an interface co-ordination plan" substitute "a safety interface agreement"; and
(b) in item 1.2, for "interface co-ordination plans" substitute "safety interface agreements".
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