Here is the URL of the main website, where you can read their mission statement.
and more importantly, look at their affiliations, namely that of the WTO.
Here is a video about Codex Alimentarius by Kevin P. Miller.
It covers a push for the "standard" before 2000
and will give you a good understanding of what it means and the implications.
Codex is in the works to be an implemented standard by the year 2009 december.