Section 62

Before the Board proceeds to open or break up any street, bridge, sewer, drain or tunnel, the Board shall give to the persons under whose control or management the same may be, or to their clerk, surveyor, or other officer, notice in writing of his intention, not less than seven clear days before beginning such work, except in cases of emergency arising from defects in any of the electric supply lines of other works, and then so soon as is possible after the beginning of the work, or after the necessity for the same shall have arisen.