I dont knwo what to say. but i will say this. the feds got out of the Law based control of cylendars and wrote a law that basically said that all handling and operations will be conducted IAW with recomendatins and regulations of existing agencies. This was done to eliminate the lag time from a problem and getting congress to act. The agincies are cga dot and others like them. so by virtue of that when those agencies figured out that they were on the hook for inadaquste required proceedures and not congress things began to change such as requireing O2 cleaning for above 23.5% and 50psi. These agencies have signed off PSI as teh group that has demonstrated and proven to be up to date in thier processes in both hasmat and cylendar concerns. PSI does not write the law they are training to provide protection for litigation by teaching the strict compliance proceeduraly to minimize your liability exposure. Ultimately the feds passed the busk adn made regulations sudo law.