The ANSI process requires that four-years after the standard has been
approved the standard may be revised, reaffirmed, or withdrawn.

The Technical Committee receive a number of proposals to change the text
of the ANS Forth document, which they will vote on.  When the TC are
happy with the revised document it is published as a draft report for
public comment. The TC must then review the comments and either publish a
new draft or submit the draft for approval by the NCITS.  It can take a
year between the TC submitting a draft for approval and the standard
being published.