Title 35, Chapter 2, Section 45
(a) Any trooper first class of the Uniform Division of the
Department of Public Safety shall be eligible for promotion to the
rank of corporal, provided he has served a period of 12 months in
the Georgia State Patrol including the period of probation.
(b) Any noncommissioned or commissioned officer shall be eligible
for promotion to a higher rank, provided he has served at least one
year in the preceding rank.
(c) Promotions to ranks of corporal through lieutenant shall be made
in accordance with the Georgia State Patrol Promotion System.