22-24B-2.1. Sex offender registry consists of three tiers. The sex offender registry shall consist of three tiers as provided for in §§ 22-24B-19 to 22-24B-19.2, inclusive. Placement in Tier III requires registrants to register throughout their lifetime. Placement in Tier II requires registrants to register for a minimum of twenty-five years. Placement in Tier I requires registrants to register for a minimum of ten years.