89.— (1) The Competent Authority in the State may request the competent authority in a designated state to permit—

(a) a controlled delivery to be made in that state, and

(b) specified persons or persons of a specified description, including members of the Garda Síochána and officers of customs and excise, to participate in the operations connected with the delivery.

(2) The request shall include particulars of the offence with which the controlled delivery is concerned.