4 The proposed rule was published in the Federal Register on May 31, 1996; HCFA stated that it would consider comments received by July 31, 1996.
The new emissions rule was published in May of 1996. 
mnli hypothesis: The new emissions rule was published in May of 1996.  premise: 4 The proposed rule was published in the Federal Register on May 31, 1996; HCFA stated that it would consider comments received by July 31, 1996.