As used in this part:

A Commercial Grade (ACG) shall refer to any quality or concentration of a chemical of interest offered for commercial sale that a facility uses, stores, manufactures, or ships.

A Placarded Amount (APA) shall refer to the STQ for a sabotage and contamination chemical of interest, as calculated in accordance with § 27.203(d).

Alternative Security Program or ASP shall mean a third-party or industry organization program, a local authority, state or Federal government program or any element or aspect thereof, that the Assistant Secretary has determined meets the requirements of this part and provides for an equivalent level of security to that established by this part.

Assistant Secretary shall mean the Assistant Secretary for Infrastructure Protection, Department of Homeland Security or his designee.

Chemical Facility or facility shall mean any establishment that possesses or plans to possess, at any relevant point in time, a quantity of a chemical substance determined by the Secretary to be potentially dangerous or that meets other risk-related criteria identified by the Department. As used herein, the term chemical facility or facility shall also refer to the owner or operator of the chemical facility. Where multiple owners and/or operators function within a common infrastructure or within a single fenced area, the Assistant Secretary may determine that such owners and/or operators constitute a single chemical facility or multiple chemical facilities depending on the circumstances.

Chemical of Interest shall refer to a chemical listed in appendix A to part 27.

Chemical Security Assessment Tool or CSAT shall mean a suite of four applications, including User Registration, Top-Screen, Security Vulnerability Assessment, and Site Security Plan, through which the Department will collect and analyze key data from chemical facilities.

Chemical-terrorism Vulnerability Information or CVI shall mean the information listed in § 27.400(b).

Coordinating Official shall mean the person (or his designee(s)) selected by the Assistant Secretary to ensure that the regulations are implemented in a uniform, impartial, and fair manner.

Covered Facility or Covered Chemical Facility shall mean a chemical facility determined by the Assistant Secretary to present high levels of security risk, or a facility that the Assistant Secretary has determined is presumptively high risk under § 27.200.

CUM 100g shall refer to the cumulative STQ of 100 grams for designated theft/diversion-CW/CWP chemicals and which is located in appendix A to part 27 as the entry for the STQ and Minimum Concentration of certain theft/diversion-CW/CWP chemicals.

Department shall mean the Department of Homeland Security.

Deputy Secretary shall mean the Deputy Secretary of the Department of Homeland Security or his designee.

Director of the Chemical Security Division or Director shall mean the Director of the Chemical Security Division, Office of Infrastructure Protection, Department of Homeland Security or any successors to that position within the Department or his designee.

General Counsel shall mean the General Counsel of the Department of Homeland Security or his designee.

Operator shall mean a person who has responsibility for the daily operations of a facility or facilities subject to this part.

Owner shall mean the person or entity that owns any facility subject to this part.

Present high levels of security risk and high risk shall refer to a chemical facility that, in the discretion of the Secretary of Homeland Security, presents a high risk of significant adverse consequences for human life or health, national security and/or critical economic assets if subjected to terrorist attack, compromise, infiltration, or exploitation.

Risk profiles shall mean criteria identified by the Assistant Secretary for determining which chemical facilities will complete the Top-Screen or provide other risk assessment information.

Screening Threshold Quantity or STQ shall mean the quantity of a chemical of interest, upon which the facility's obligation to complete and submit the CSAT Top-Screen is based.

Secretary or Secretary of Homeland Security shall mean the Secretary of the Department of Homeland Security or any person, officer or entity within the Department to whom the Secretary's authority under section 550 is delegated.

Security Issue shall refer to the type of risks associated with a given chemical. For purposes of this part, there are four main security issues:

Release (including toxic, flammable, and explosive);

Theft and diversion (including chemical weapons and chemical weapons precursors, weapons of mass effect, and explosives and improvised explosive device precursors),

Sabotage and contamination, and

Critical to government mission and national economy.

Terrorist attack or terrorist incident shall mean any incident or attempt that constitutes terrorism or terrorist activity under 6 U.S.C. 101(15) or 18 U.S.C. 2331(5) or 8 U.S.C. 1182(a)(3)(B)(iii), including any incident or attempt that involves or would involve sabotage of chemical facilities or theft, misappropriation or misuse of a dangerous quantity of chemicals.

Tier shall mean the risk level associated with a covered chemical facility and which is assigned to a facility by the Department. For purposes of this part, there are four risk-based tiers, ranging from highest risk at Tier 1 to lowest risk at Tier 4.

Top-Screen shall mean an initial screening process designed by the Assistant Secretary through which chemical facilities provide information to the Department for use pursuant to § 27.200 of these regulations.

Under Secretary shall mean the Under Secretary for National Protection and Programs, Department of Homeland Security or any successors to that position within the Department or his designee.