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[quote user="jeffhergert"]Before that, the required amount was a "sufficient number" and we didn't have to release the air to see if they held.  The instructions have changed over time.  The first ones issued were overkill, a knee-jerk reaction to an event and have become more realistic over time. [/quote][quote user="jeffhergert"]My railroad does issue guidelines and minimums to set.  But they are just that, guidelines and minimums.  That's why they still use the phrase "a sufficient number." [/quote] Jeff, Are you are saying that “required amount” and “sufficient number” are two different things, but they have been sometimes interpreted to mean the same thing?
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