# The Mines and Quarries (Tipping Plans) Rules 1971, Article 9: Correlation


Every such plan shall indicate—
(a) the direction of the National Grid North;
(b) the date on which it was made; and
(c) the date on which it was last revised.

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Source: https://www.legislation.gov.uk/uksi/1971/1378/article/9 (the official version)
Page: https://openlegislation.uk/mines-and-quarries-tipping-plans-rules-1971/article-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.