Really, it's beginning to bother me that there was no consultation with representatives of workers. One of the key things I know about health and safety is this: if you really want to have an actively engaged workforce, you need to engage people in the changes you're bringing about. Any change should make things more explicit. But taking away words allows people to think they don't have rights they actually have.
Under the new code, could an employee refuse the right to work if he or she believed a condition might cause no imminent threat but might chronically impact his or her health in the long term? This is from your reading of it.