.-(1) Pipeline shall be laid in the most favourable route, avoiding as far as possible, known obstructions and areas in which unusual external conditions prevail.(2)Pipeline shall be laid below the ground level except where laying thereof above the ground level is desirable for typographical, economic or other special reasons.(3)Where an underground pipeline has to cross any existing underground water or gas line, cable, drain or other services, the pipeline shall be laid at least thirty centimetres below such services in a manner that will not obstruct access to such services for inspection, repair, or maintenance.(4)The number of bends in the pipeline shall be kept to the minimum by proper grading of trenches or supports at crossing and other obstacles.(5)The route of underground sections of a pipeline shall be indicated by markers and not less than two such markers shall be visible from any point along the route.
