5. The Act applies to an employee referred to in section 2, 3 or 4 or to a person who was so referred to and to whom section 143.1 of the Act applies in the same manner as it applies to an employee or person to whom section 143.1 of the Act applies. However, for the purposes of Division III of Chapter I of the Act, the years and parts of a year of service credited under the Pension Plan of Peace Officers in Correctional Services pursuant to section 3 or 4 are taken into account only if the employee was a member of the Plan on 31 December 2004.