5.—(1) In carrying out the work authorised by article 3 (power to carry out quay work), the Trust may deviate laterally from the lines or situations as shown on the deposited plan to any extent within the limits of deviation shown on the said plan for Work No 1, and may deviate vertically from the levels of the works as shown on the deposited sections to any extent not exceeding 2 metres upwards and to such extent downwards as may be found necessary or convenient.
(2) The limit of the area of lateral deviation referred to in paragraph (1) is indicated by a dashed line on the plan starting at point L8 (310022 970245) and travelling in straight lines via points L9 (310143 970333), L10 (310204 970278), L11 (310094 970199), L12 (310089 970206), L13 (310065 970189), L14 (310044 970187) and returning to point L8.
(3) In carrying out the dredging works, the Trust may:—
(a)deviate laterally from the lines or situations as shown on the deposited plan to any extent within the limits of deviation shown on the said plan; and
(b)deviate vertically from the levels of the works as shown on the deposited sections to any extent upwards below the existing sea bed and to any extent not exceeding 2 metres downwards.
(4) The seaward limit of the area referred to in paragraph (3)(a) is wholly within the harbour limits and is indicated by a dashed line on the plan, starting at point L1 (310383 970264) and travelling in straight lines via points L2 (310420 970168), L3 (310465 970086), L4 (310419 970020), L5 (310363 970043), L6 (310260 970161) and ending at point L7 (310252 970155).