If after lay offs have occurred and for a period of one calendar year after the 30th of September following the date of lay off, teachers who have been laid off and have given written notice that they wish to be recalled shall be offered the position first when positions become available, provided such teachers have the necessary training or academic qualifications or experience for the positions available. Seniority with the Board will be used to determine the order in which laid off teachers are offered the available positions provided that the said teachers have the necessary training or academic qualifications or experience.