Then in 2001 he was appointed as the initial Chairman of the International Accounting Standards Board .
From 1990 to 2000 Tweedie served as the full - time chairman of the Accounting Standards Board .
Then in 2001 Tweedie was appointed as the initial Chairman of the Accounting Standards Board       .
From 1990 to 2000 Tweedie served as the full - time chairman of the Accounting Standards Board .