Officers serve for 11.5 months, while the majority of rank-and-file conscripts serve for 5.5 months. Reserve Officer School trains reserve officers, most of whom do not continue in active service but are demobilised to the reserve at the end of their conscription. Their service obligation as reservists continues until the age of 60. The reserve officers do not have a military standing while in reserve but when called to active service, reserve officers rank with career officers. The activation may take place for voluntary exercises, for obligatory refresher exercises or, in emergencies, for extraordinary service or for mobilisation. Based on their performance during service in the reserve, reserve officers may be promoted to higher ranks. The highest rank for which reserve officers are eligible is major (in Navy, lieutenant commander), and in extremely rare cases, lieutenant colonel (in the Navy, commander. All officer promotions are decided by the President of Finland, both for career and reserve officers. The training of a reserve officer is also an obligatory prerequisite for attending the National Defence University. Those conscript NCOs who are accepted to the National Defence University, are selected on the condition of passing a platoon-leader course that gives the equivalent training as the Reserve Officer School. The Training in the Reserve Officer School After the first seven weeks of the NCO school, those most suitable for Reserve Officer training are selected on the basis of the first phase of schooling and the basic conscript phase. In the Reserve Officer School students receive training for the duties of platoon leader (or equivalent). The curriculum includes studies in leadership, tactics and physical education. After a 3½-month-long course, they are promoted to officer cadets and sent to their 'home' garrisons to train their wartime platoons from the recruits. After 5 months of service as officer cadets, they are promoted second lieutenants and discharged. Come war, they would ideally lead more or less the same platoon as they led at training time. Traditionally, the training of a reserve officer has carried certain social distinction and has been tied to high positions in industry and economy. E.g. former Nokia CEO Jorma Ollila was the Chairman of his Reserve Officer course. The high educational level of most reserve officers offers the Finnish Defence Forces a chance to fill many wartime vacancies on the basis of civilian professions. For instance, a manager of a civilian transportation company might