If any such delay,
neglect or omission contrary to the provisions of sections four and five of
this Act, take place, the Minister or local authority may cause any work so
delayed, neglected or omitted to be completed, executed or performed, and all
expenses so incurred shall be repaid to the Minister or the local authority,
as the case may be, by the operator:
Provided that nothing
in this section contained shall render it compulsory for the Minister or local
authority to complete, execute or perform any such work or render either of
them liable for any delay, neglect or omission so to do.