15. A requisition for the surrender to Bangladesh of a person who, being accused or convicted of an extradition offence, is or is suspected to be in a treaty State may be made by the Government,-(a) to the diplomatic representative in Bangladesh of that State;(b) to the Government of that State through the diplomatic representative of Bangladesh in that State; or(c) in such other manner as may have been settled by arrangement between the Government and the Government of that State.

16. A person surrendered by a treaty State in pursuance of a requisition under section 15 shall not, until he has been restored or has had an opportunity of returning to that State, be tried in Bangladesh for an offence committed prior to the surrender, other than the extradition offence proved by the facts on which the surrender is based.

17. The Government may, if it thinks fit, on the request of a person surrendered to Bangladesh in pursuance of a requisition under section 15, arrange for him to be sent back at the cost of the Government and with as little delay as possible to that State by which he was so surrendered if,-(a) proceedings against him for the offence for which he was surrendered are not begun within the period of six months from the day of his arrival in Bangladesh; or(b) he is acquitted or discharged on his trial for that offence.