BMD, the IMF is not a signatory to the WAOG. Nor is the story you have supplied the "real story" on IMF gold, it is a set of vacuous and alarmist propositions. For the real story, see:
http://www.imf.org/External/NP/EXR/faq/goldfaqs.htm and http://www.imf.org/external/np/exr/facts/gold.htm
To summarise these briefly, the IMF is not permitted by its constitution to sell 87.5% of its current holdings. This part can only be disposed of by redemption to the countries who originally provided it, at $35 per ounce. Such redemptions require 85% approval from IMF member countries.
There has been a proposal to sell the other 12.5%, but it has not yet been ratified by the IMF. The IMF has made a commitment that if such a sale proceeds, it will be done in such a way as to cause minimal disruption to gold markets, by coordinating the sales within current and future central bank gold agreements.