Paragraph 21 Underground Works (London) Act 1956I1 United Kingdom The Underground Works (London) Act 1956f1 is amended as follows. Annotations Commencement I1 Sch. 1 para. 21 in force at 1.6.2009, see art. 1 Footnotes f1 1956 c.59. ← Paragraph 20 Paragraph 21 Paragraph 22 →