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The deadlines for 2013 are here: https://www.300hours.com/1/post/2013/01/two-key-factors-to-consider-when-registering-for-the-cfa-exams.html
First deadline was 19th September, so if it follows a similar schedule you probably have about 2 months. The large bump in price comes after the second deadline though, which is about mid-Feb.