Historical clue formulations

• Intl. commerce pact replaced by the W.T.O. — 2011-01-26
• Letters of commerce — 2008-11-16
• Commerce treaty starting 1947 — 2008-08-24
• Intl. commercial agreement first signed in 1947 — 2007-09-09
• Intl. org. since 1948 — 2000-07-30
• Intl. business accord — 1995-12-26
• Intl. commerce org. — 1995-08-28
• Free-trade measure of '94 — 1995-05-28