If your interpretation is correct that the amendment is not intended to exclude the application of the act from areas of concurrent jurisdiction, we need to consider precisely what it is intended to do.
Let me be the devil's advocate for a moment. Previously, with the section, the act clearly referred only to work outside the exclusive legislative authority of the province. If we remove that provision it may be inferred that we're trying to go after work that is within the exclusive legislative authority of the provinces.