(1) Subject to subsection (11), the IANS shall prepare and submit to the Minister a scheme or schemes for the granting of superannuation benefits to or in respect of such members of the staff of the IANS as it may think fit.

(2) Every such scheme shall fix the time and conditions of retirement for all persons to or in respect of whom superannuation benefits are payable under the scheme, and different times and conditions may be fixed in respect of different classes of persons.

(3) Every such scheme may be amended or revoked by a subsequent scheme prepared, submitted and approved under this section.

(4) A scheme submitted by the IANS under this section shall, if approved by the Minister with the consent of the Minister for Public Expenditure and Reform, be carried out by the IANS in accordance with its terms.

(5) Superannuation benefits granted under schemes under this section to persons who, immediately before the vesting day, were members of the staff of the IAA, and the terms and conditions relating to those benefits, shall not be less favourable to those persons than those to which they were entitled immediately before that day.