Survey of riverbedE+W+S
46.—(1) The PLA may, at TfL's expense (such expense to be that which is reasonably incurred), carry out a survey (or externally procure the carrying out of a survey) for the purpose of establishing the condition of the river Thames—
(a)before the commencement of construction of the first specified work below mean high water level to be constructed following approval under paragraph 34;
(b)before the commencement of construction of any other specified work, or the carrying out of any other specified function, approved under paragraph 34;
(c)during the construction of any specified work, or the carrying out of any specified function, as is reasonably required; and
(d)after completion of, respectively—
(i)any specified work and the exercise of all related specified functions; and
(ii)all the specified works constructed and specified functions carried out under this Order in relation to such construction,
of such parts of the river Thames as might be affected by sedimentation, scouring, currents or wave action that might result from the construction of the relevant specified work, or the carrying out of a specified function as would, if it were to be constructed or carried out, constitute specified works, or give rise to operations, below mean high water level.
(2) The PLA must make available to TfL the results of any survey carried out under this paragraph.
(3) The PLA must not under this paragraph carry out a survey of any part of the river Thames in respect of which TfL has provided to the PLA survey material which the PLA is satisfied establishes the condition of the river Thames, and in the case of a survey under sub-paragraph (1)(c), the effect of the specified works and the specified functions.
(4) A survey carried out under this paragraph is the property of the PLA.