1. A unionizable employee who meets the conditions mentioned in subparagraphs 1 to 3 of the first paragraph of section 215.0.1 of the Act respecting the Government and Public Employees Retirement Plan (chapter R-10) may avail himself of the special provisions applicable to non-unionizable employees provided for in Title IV.1 of that Act, if he has become a unionizable employee after 30 June 1993, pursuant to his working conditions as a non-unionizable employee, and if he has not ceased to participate in the Government and Public Employees Retirement Plan since he became a unionizable employee.