Paragraph 4 I1 Northern Ireland Not yet in force Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below: Sch. 4 para. 1 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 2 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 3 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 4 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 5 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 6 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 7 coming into force by Pipelines Safety 1997 reg. 1 Sch. 4 para. 8 coming into force by Pipelines Safety 1997 reg. 1 The length, diameter and wall thickness of the pipeline. Annotations Commencement I1 Sch. 4 para. 4 in operation at 12.5.1997, see reg. 1 ← Paragraph 3 Paragraph 4 Paragraph 5 →