(2) A student nurse who has successfully completed his or her examination for the certificate in general nursing may elect to remain at the Victoria Hospital for another period of 12 months, or, with the permission of the Chief Medical Officer, for a longer period, for training in midwifery, and at the end of this period, or such longer period as may be approved by the Chief Medical Officer, he or she shall sit the examination for the certificate in midwifery.