J-3, r. 3 - Rules of procedure of the Administrative Tribunal of Québec

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9. Where duties, fees or other expenses are established for filing a document, the document is not validly filed unless these have been paid.
However, in the case of the motion instituting proceedings, an applicant who has not fully paid the prescribed duties, fees or expenses in full may do so within 30 days following the receipt of the motion by the Tribunal.
O.C. 1217-99, s. 9.