Article 6 Power to deviate

In constructing Works Nos. 1 to 11 A.B. Ports may deviate laterally from the lines or situations shown on sheet 1 of the deposited maps and described in article 4 (Power to make works) above to the extent of the limits of deviation and may deviate vertically from the levels shown on sheets 3, 4 and 5 of the deposited maps to any extent not exceeding three metres upwards and to such extent downwards as may be found necessary or convenient.