6 CFR § 27.220 - Tiering.

---
identifier: "/us/cfr/t6/s27.220"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "6 CFR § 27.220 - Tiering."
title_number: 6
title_name: "Domestic Security"
section_number: "27.220"
section_name: "Tiering."
chapter_name: "DEPARTMENT OF HOMELAND SECURITY, OFFICE OF THE SECRETARY"
part_number: "27"
part_name: "CHEMICAL FACILITY ANTI-TERRORISM STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "6 U.S.C. 624; Pub. L. 101-410, 104 Stat. 890, as amended by Pub. L. 114-74, 129 Stat. 599; Pub. L. 113-254, 128 Stat. 2898, as amended by Pub. L. 116-150, 134 Stat. 679."
regulatory_source: "72 FR 17729, Apr. 9, 2007, unless otherwise noted."
cfr_part: "27"
---


# 27.220 Tiering.

(a) *Preliminary determination of risk-based tiering.* Based on the information the Department receives in accordance with §§ 27.200 and 27.205 (including information submitted through the Top-Screen process) and following its initial determination in § 27.205(a) that a facility presents a high level of security risk, the Department shall notify a facility of the Department's preliminary determination of the facility's placement in a risk-based tier.

(b) *Confirmation or alteration of risk-based tiering.* Following review of a covered facility's Security Vulnerability Assessment, the Executive Assistant Director shall notify the covered facility of its final placement within a risk-based tier, or for covered facilities previously notified of a preliminary tiering, confirm or alter such tiering.

(c) The Department shall place covered facilities in one of four risk-based tiers, ranging from highest risk facilities in Tier 1 to lowest risk facilities in Tier 4.

(d) The Executive Assistant Director may provide the facility with guidance regarding the risk-based performance standards and any other necessary guidance materials applicable to its assigned tier.

[72 FR 17729, Apr. 9, 2007, as amended at 86 FR 41892, Aug. 4, 2021]