Part LENGTHS OF MOTORWAY FORMING PART OF THE M621 AT LEEDS England and Wales Not yet in force Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below: Sch. 2 para. 1 coming into force by M621 Motorway (Speed Limit) 2000 reg. 1 Sch. 2 para. 2 coming into force by M621 Motorway (Speed Limit) 2000 reg. 1 Sch. 2 para. 3 coming into force by M621 Motorway (Speed Limit) 2000 reg. 1 Sch. 2 para. 4 coming into force by M621 Motorway (Speed Limit) 2000 reg. 1 1Paragraph 1 2Paragraph 2 3Paragraph 3 4Paragraph 4 Part