4.2. Content of the permit application: A permit application made under section 4 for the construction of an additional bedroom in an isolated dwelling, a change in the use of a building or site or an increase in the operating or utilization capacity of a building or site referred to in section 2 and the construction, change or increase does not serve to increase the total daily flow of domestic waste water beyond the capacity of the system for the discharge, collection or disposal of domestic waste water, grey water or toilet effluents, must include
(1) the information required by subparagraphs 1, 2 and 3 of the first paragraph of section 4.1; and
(2) an attestation from a professional certifying that the system for the discharge, collection or disposal of domestic waste water, grey water or toilet effluents is able to treat the additional volume. For an isolated dwelling, the attestation must be provided by a professional within the meaning of section 1 of the Professional Code (chapter C-26) whose professional order governs the practise of the professional activity. For a building other than an isolated dwelling, the attestation must be provided by an engineer.