It shall be the responsibility of the teacher to report an address to which a recall notice can be delivered. Recall notices will be delivered by registered mail to the last reported address given by the teacher and a teacher who is recalled from lay-off shall be required to indicate, notwithstanding any other time limits in this policy, within 15 teaching days of the registered letter being sent, his/her intent to return to work and shall be required to return to work on the date set out in the notice which date shall not be less than one month's calendar days following such notification, unless by written mutual agreement. Failure to respond within the time limits specified or agreed to shall relieve the onus on the Division for that teacher's placement on the re-employment list and he/she shall lose seniority.