The principle that Dr. Tam was attempting to convey was that if you include something in a statutory provision, then it becomes law and essentially cannot be modified. That would be the case with respect to limiting the responsibilities of persons using risk group 2 pathogens and the Laboratory Biosafety Guidelines.
The consultations that Dr. Tam and her colleagues are seeking on the guidelines would reveal how stakeholders and persons subject to this act feel about its provisions. The consultation process would also be helpful in terms of developing a program that would meet both Dr. Tam's need to ensure the biosafety of human pathogens and the needs of researchers who work with these substances.
However, if you include this in the act, there is no flexibility. The main point is that regulations allow for greater flexibility.