The Secondary School Certificate (SSC) examinees will have to enter their respective centres half an hour before the tests begin.
Otherwise they will not be allowed to sit for the examinations, the education ministry said aiming to prevent question paper leak, copying or any other forms of unfair means in the examinations.
The ministry also issued a circular on Wednesday following a meeting led by Md Sohrab Hossain, Secretary to the Secondary and Higher Education Division.
The meeting discussed possible ways to stop question leaks, according to the circular.
The discussions include carrying the questions inside specially sealed envelopes, making multiple sets of questions, using pin codes, using USB drives to carry questions inside centres and blocking internet connections around centres for the time being.
No-one except the centre secretary will be allowed to take smartphone inside the centre, as per decisions taken at the meeting.
The written part of the Secondary School Certificate and equivalent examinations will be held between Feb 1 and Feb 24 this year.
The same rule was announced on October 24 last year but it was hardly applied during the Junior School Certificate (JSC) and Junior Dakhil Certificate (JDC) examinations.
According to bdnews24, students were found checking phones for leaked questions and answers outside the centres across Dhaka. The leaked questions matched the ones that appeared in the actual exams.
Different Facebook pages and social media apps became hubs of leaked questions.
Education Minister Nurul Islam Nahid claimed questions were being leaked from the exam centres and it was the teachers who were doing it.