In answer to the question why is the important safety note password protected: it is information available to military diving commands only not the general public; for reasons that have not been completely clear at this time.
as far as the regs well here it goes:
back last year there were a few cases of poseidon 2nd stage hoses parting at the swedge while diving, this caused quite a stir and well between posiedon and the USN they came up with a testing method to verify hose integrity, this process went to all military diving commands,
but just when you think it was over, this year Feb- Mar time frame again there were a few failures of the 2nd stage hose at the swedge yet again, NAVSEA decided to warn all diving commands that they were stop diving the Posiedon Odon regular until further notice, the 1st stage however, could still be used with an AGA mask. the issue still has not been completely solved and until it does I guess you will have to wait a little while longer till I get the info.
I hope this answered your questions..
rainreg