A teacher shall lose seniority for any of the following reasons:
i) The teacher resigns,
ii) The teacher becomes employed by another school division,
iii) The teacher fails to return to work after the termination of any leave period granted by the Division,
iv) The teacher is not re-employed within one (1) calendar year after September 30, following the date of layoff,
v) The teacher's contract is terminated for cause,
vi) Any teacher on the re-employment list who refuses to accept a position for which the teacher has the necessary training, academic qualifications and ability to perform the work in the offered position, shall forfeit all rights of seniority and re-employment.