22. Certification may be applied for(a) at any time, in the case of a group of employees not represented by a certified association and not already contemplated, in whole or in part, in an application for certification;
(b) (paragraph repealed);
(b.1) subject to subparagraph b.2, 12 months after the date of a certification, in the case of a group of employees for whom a collective agreement has not been made and for whom a dispute has not been submitted for arbitration or is not the object of a strike or lock-out permitted by this Code;
(b.2) 12 months after the decision of the Tribunal on the description of the bargaining unit rendered under paragraph d.1 of section 28, in the case of a group of employees for whom a collective agreement has not been made and for whom a dispute has not been submitted for arbitration or is not the object of a strike or lock-out permitted by this Code;
(c) nine months after the date of expiration of a collective agreement or of an arbitration award in lieu thereof, in the case of a group of employees for whom a collective agreement has not been made and for whom a dispute has not been submitted for arbitration or is not the object of a strike or lock-out permitted by this Code;
(d) from the ninetieth to the sixtieth day prior to the date of expiration of an arbitration award in lieu of a collective agreement or the date of expiration of a collective agreement or of its renewal where the term of the collective agreement is three years or less;
(e) from the one hundred and eightieth to the one hundred and fiftieth day prior to the date of expiration of a collective agreement or of its renewal where the term of the collective agreement is more than three years and, where such term so allows, during the period extending from the one hundred and eightieth to the one hundred and fiftieth day prior to the sixth anniversary of the signing of the collective agreement or of its renewal and every other anniversary thereafter, except where such a period would end within 12 months or less of the one hundred and eightieth day prior to the date of expiration of the collective agreement or of its renewal.