289.1.Section 59, as it read prior to 5 June 1997, shall continue to apply to a pension to which the member or spouse is entitled on that same date the amount of which is adjusted to take into account an amount equal to the benefits determined under the Old Age Security Act (Revised Statutes of Canada, 1985, chapter O-9), the Act respecting the Québec Pension Plan (chapter R-9) or a similar plan within the meaning of paragraph u of section 1 of the latter Act.