25. (1) The Irish Prison Service shall notify the Board in writing at intervals of not more than one year of the persons serving sentences of imprisonment who—

(a) are eligible for parole, whether for the first time or not, or

(b) to the knowledge of the Irish Prison Service, shall become so eligible in the period of 18 months following the date of the notification.

(2) Where a person becomes ineligible for parole by virtue of the operation of subsection (7), (8), (9), (10), (11), (12), (13), (14) or (15) of section 24, the Irish Prison Service shall, as soon as practicable after it becomes aware of the person becoming so ineligible so notify the Board in writing.

(3) Where a person who became ineligible for parole by virtue of the operation of subsection (7), (8), (9), (10), (11), (12), (13), (14) or (15) of section 24 ceases to be so ineligible and is otherwise eligible for parole, the Irish Prison Service shall, as soon as practicable after it becomes aware of the person becoming eligible for parole so notify the Board in writing.