Carrying out protective works and specified works
64. Any specified works and any protective work specified pursuant to paragraph 63(4) must, when commenced, be constructed—
(a)without unnecessary delay in accordance with the plans approved or deemed to have been approved or settled under paragraph 63;
(b)under the supervision (where appropriate and if given) and to the reasonable satisfaction of the engineer;
(c)in such manner as to cause—
(i)as little damage as is reasonably practicable to the guided busway property; and
(ii)as little interruption as is reasonably practicable to the guided busway service.