I would like to clarify that the current Canadian regulations for the retention of cockpit voice recordings is only for 30 minutes. The TSB, following the accidents, recommended a minimum of two hours, which is the international standard.
With respect to LVVR recordings, the duration—how long—is something that will be worked out as part of the regulations. We would prefer longer, because often the seeds of an occurrence can happen much earlier than even two hours before, but those details will be worked out as part of the regulations.