[Al Skierkiewicz]

I believe if you examine the effects of the rule change, based on a working pressure of 60 psi. A failure in the regulator could allow max high side pressure to enter the working side of the pneumatic system. If using parts rated at less than 125 psi then a relief valve (of a rating that will protect those parts) is needed as a safety to prevent catastrophic failures of those components.
Safety First everyone.