197. The modification of a sewer system is exempted from authorization pursuant to this Subdivision on the following conditions:
(1) the modification does not involve a device for treating wastewater;
(2) the specifications for the work are prepared in accordance with the standard specification BNQ 1809-300 or at least meet the requirements of that specification for the work concerned;
(3) once the work is completed, the modified system or extension is not likely to cause an increase in the frequency of overflow events for any of the overflows situated downstream from the connection point or an increase in the frequency of diversions at the treatment plant.
For the purposes of this section, a modification includes, in addition to what is specified in section 174, the addition of any equipment, accessory or device to an existing sewer system and any repair made to a pumping station, overflow or retention basin.