When any person, Local
Authority, or Government Department proposes to carry out any work which would
be likely to interfere with any Standard Survey Mark, such person, Local
Authority or Government Department shall give notice to the Surveyor General,
who shall, where advisable, take all necessary steps to safeguard such Mark,
and the proposed work shall not be commenced until advice has been received
from the Surveyor General that such steps have been taken. The cost of any
work carried out by the Surveyor General under this clause shall be paid by
and be recoverable from such person, local authority or Government Department.