We have mandated State training over various topics every year, on top of our departments training. Usually, use of force, legal update of new laws, active shooter, defensive tactics, tactical driving, investigations, first aid, new department general orders...etc, and whatever hot topics come up. The training is mandatory for every sworn officer, regardless of rank.
Sergeants have to take a supervisors course when promoted. Lieutenants have to take a more advanced supervisor course once promoted, as well as Captains. Asst. Chiefs do some admin courses.
Officers and detectives can participate in Alternative Career Ladder (ACL), which is basically studying different police related fields, then take test on the course material. It's voluntary, but pay extra dough per level of ACL.