Calcutta, May 26 :    Calcutta, May 26:  Governor Viren J. Shah, who is also the chancellor of Calcutta University, has recently given his assent to the code of professional ethics for teachers working in 68 colleges in the city affiliated to the university. As a result, college teachers are now bound to do examination duty, including invigilation at examination centres and examining answerscripts. Apart from the 68 colleges in the city, 36 colleges in North 24-Parganas, 28 colleges in South 24-Parganas, 31 colleges in Howrah and seven colleges in Hooghly will come under the purview of the code. It allows colleges and universities to take punitive measures against teachers for refusing to examine answerscripts or do any other examination-related work. Calcutta University vice-chancellor Ashis Banerjee said all 68 colleges have already been informed about the chancellor's assent to the code and sent copies through courier service. 'The code has already been implemented in all the colleges affiliated to the university,' said Banerjee. Under the new code, college teachers will have to attend classes five days a week and work for five hours daily. Henceforth, each teacher will have to sign the attendance register, mentioning times of arrival and departure. College authorities can initiate disciplinary measure against a teacher for irregular attendance or early departure. The chancellor had attended the annual budget meeting of the Calcutta University Senate on March 28. At the meeting, some CPM Senate members had criticised Shah for not giving his assent to the code of ethics which the university had referred to him in August 2000. As per his promise at the meeting, Shah cleared the code soon after. Syndicate member Anil Bhattacharjee said they welcomed Shah's decision to give his assent to the code of ethics, which, he said, will help college authorities conduct examinations and run the institutions properly. The government has set up a one-man committee, comprising former Calcutta University vice-chancellor Ramen Poddar, to formulate a similar code for teachers of state-run colleges. The Poddar committee is expected to submit its report soon.