three ranks: Knight, Officer, Commander, and two titles: Grand Officer and Grand Cross. Knight is the most common and is awarded for either at least 20 years of public service or acts of military or civil bravery. The rest of the categories have a quota for the number of years of service in the category below before they can be awarded.
These distinctions have three levels: Esquire, Officer, Commander, and two prestigious titles: Grand Officer and Grand Cross. The higher ranks require a minimum amount of service before they can be granted.