--the area where the agency may make regulations or, pardon me, guidelines.
It is our submission that the agency must. We believe that should be “must”, not “may”, and in our view the guidelines should be in the form of regulation, if that is at all possible.
Yes, we do believe that the guideline or regulation should be based on some established criteria. We suggest the CMHC, who have decibel levels for residential neighbourhoods, or if there's some other recognizable agency--the World Health Organization, as you referred to--that some objective standard be made, rather than the subjective language as is proposed. Your definition of “reasonable” versus mine versus a railway company's may leave a lot to be desired.
Perhaps that answers your question, Mr. Bell.