74.5. Notwithstanding the third paragraph of section 123 of the Act respecting land use planning and development (chapter A-19.1), a by-law adopted by the city council under section 74.4, except a by-law authorizing the carrying out of a project referred to in subparagraph 5 of the first paragraph of that section, is not subject to approval by way of referendum. Sections 124 to 127 of the Act respecting land use planning and development do not apply to a by-law authorizing the carrying out of a project referred to in subparagraph 4 of the first paragraph of section 74.4.