12. Request by a specified country for prisoner in Sri Lanka to give evidence or assist investigation

such person has consented to giving evidence in such proceeding or to being removed to such specified country for the purposes of giving assistance in relation to such investigation, as the case may be ; and

the specified country has given any undertakings required by the Central Authority, in respect of such prisoner, including undertakings as to meeting the costs of travel of the prisoner to the specified country and as to the period for which such prisoner shall be held in custody in the specified country, direct in writing, the release of such prisoner from prison for the purposes of removal to the specified country and make arrangements for the travel of such prisoner to the specified country.

the release of such prisoner from the prison in which he is held in custody and the delivery of such prisoner, in the custody of a prison officer, in or outside Sri Lanka, into the custody of a person representing the appropriate authority of the specified country requesting the removal of such prisoner ;

the bringing of the prisoner back to Sri Lanka and his delivery, in the custody of a prison officer, into the custody of the prison from which he was released for the purposes of removal to the specified country.

a proceeding or an investigation relating to a criminal matter has commenced in a specified country ;

the appropriate authority in the specified country requests the attendance, of a person (not being a prisoner) who is in Sri Lanka, at a hearing in connection with that proceeding or for the purposes of giving assistance in relation to such investigation, as the case may be ;

there are reasonable grounds to believe that the person, is capable of giving evidence relevant to such proceeding, or of giving assistance in relation to such investigation, as the case may be ; and

the Central Authority is satisfied that—

such person has consented to travel to such specified country, to give evidence in such proceeding or to give assistance in relation to such investigation as the case may be ; and

the appropriate authority in the specified country has given any undertaking required by the Central Authority with respect to such person, including undertakings as to meeting the costs of travel of such person to the specified country, the Central Authority may, in his discretion, make arrangements for the travel of that person to the specified country.