According to Chapter 2, Section 1 of FFS 2018:7, a person who is eligible for promotion has served in the Swedish Armed Forces to such an extent that assessment of suitability, knowledge and skills could be carried out, is deemed suitable for promotion, possesses the knowledge and skills required for the higher rank, and meets time requirements according to Section 2 (must have held the rank for at least two years). For promotion from sub-lieutenant to lieutenant, it is only required that the sub-lieutenant is promotable according to Chapter 2, Section 1.