33 CFR § 101.505 - Declaration of Security (DoS).

---
identifier: "/us/cfr/t33/s101.505"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 101.505 - Declaration of Security (DoS)."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "101.505"
section_name: "Declaration of Security (DoS)."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "H"
subchapter_name: "MARITIME SECURITY"
part_number: "101"
part_name: "MARITIME SECURITY: GENERAL"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 70101-70104 and 70124; Executive Order 12656, 3 CFR, 1988 Comp., p. 585; 33 CFR 1.05-1, 6.04-11, 6.14, 6.16, and 6.19; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "USCG-2003-14792, 68 FR 39278, July 1, 2003, unless otherwise noted."
cfr_part: "101"
---


# 101.505 Declaration of Security (DoS).

(a) The purpose of a DoS, as described in SOLAS Chapter XI-2, Regulation 10, and the ISPS Code (Incorporated by reference, see § 101.115), is to state the agreement reached between a vessel and a facility, or between vessels in the case of a vessel-to-vessel activity, as to the respective security measures each must undertake during a specific vessel-to-facility interface, during a series of interfaces between the vessel and the facility, or during a vessel-to-vessel activity.

(b) Details as to who must complete a DoS, when a DoS must be completed, and how long a DoS must be retained are included in parts 104 through 106 of this subchapter. A DoS must, at a minimum, include the information found in the ISPS Code, part B, appendix 1 (Incorporated by reference, see § 101.115).

(c) All vessels and facilities required to comply with parts 104, 105, and 106 of this subchapter must, at a minimum, comply with the DoS requirements of the MARSEC Level set for the port.

(d) The COTP may also require a DoS be completed for vessels and facilities during periods of critical port operations, special marine events, or when vessels give notification of a higher MARSEC Level than that set in the COTP's Area of Responsibility (AOR).

[USCG-2003-14792, 68 FR 39278, July 1, 2003, as amended at 68 FR 60472, Oct. 22, 2003]