Question: Why did OSHA reissue STD 3.1 as STD 3-0.1A in 1998?

Answer:

OSHA issued STD 3-0.1A (later redesignated as STD 03-00-001) as a plain language replacement for STD 3.1. In STD 03-00-001, the Agency made some changes to the original interim guidance to clarify the scope of the directive and the Agency's enforcement policy with respect to fall protection requirements for the specific construction activities covered by the directive. In STD 03-00-001, OSHA indicated that it intended to reevaluate the interim policy after soliciting additional public comment.