Section 24(2)(b) in The Assam Economic and Statistical (Junior) Service Rules, 1980
(b)if he fails to appear at or pass the departmental examination or other tests, as may be prescribed, or fails to undergo successfully such training as may be prescribed, unless the Appointing Authority permits him to sit for re-examination in the subject or subjects or in the tests in which he failed or to undergo the training again which he failed to undergo successfully; or