I want to know the answer to the following question:
When was the draft passed to have MPEG-1 Audio approved as a standard?
All the background I'm provided with is that "MPEG-1 Audio (MPEG-1 Part 3), which included MPEG-1 Audio Layer I, II and III was approved as a committee draft of ISO/IEC standard in 1991, finalised in 1992 and published in 1993 (ISO/IEC 11172-3:1993).". Is that enough to answer the question?