Paragraph 49 FencingI1

Where so required by the engineer and where that requirement has been evidenced in writing the undertaker must to the reasonable satisfaction of the engineer and upon providing reasonable notice of not less than 28 days fence off a specified work or a protective work or take such other steps as the engineer may reasonably require to be taken for the purpose of separating a specified work or a protective work from the waterway, whether on a temporary or permanent basis or both.