(1) Zone 1. All navigable waters of the Potomac River, from shoreline to shoreline, bounded to the north by the Francis Scott Key (US-29) Bridge, at mile 113, and bounded to the south by a line drawn from the Virginia shoreline at Ronald Reagan Washington National Airport, at 38°51′21.3″ N., 077°02′00.0″ W., eastward across the Potomac River to the District of Columbia shoreline at Hains Point at position 38°51′24.3″ N., 077°01′19.8″ W., including the waters of the Boundary Channel, Pentagon Lagoon, Georgetown Channel Tidal Basin, and Roaches Run;

(2) Zone 2. All navigable waters of the Anacostia River, from shoreline to shoreline, bounded to the north by the John Philip Sousa (Pennsylvania Avenue) Bridge, at mile 2.9, and bounded to the south by a line drawn from the District of Columbia shoreline at Hains Point at position 38°51′24.3″ N., 077°01′19.8″ W., southward across the Anacostia River to the District of Columbia shoreline at Giesboro Point at position 38°50′52.4″ N., 077°01′10.9″ W., including the waters of the Washington Channel;

(3) Zone 3. All navigable waters of the Potomac River, from shoreline to shoreline, bounded to the north by a line drawn from the Virginia shoreline at Ronald Reagan Washington National Airport, at 38°51′21.3″ N., 077°02′00.0″ W., eastward across the Potomac River to the District of Columbia shoreline at Hains Point at position 38°51′24.3″ N., 077°01′19.8″ W., thence southward across the Anacostia River to the District of Columbia shoreline at Giesboro Point at position 38°50′52.4″ N., 077°01′10.9″ W., and bounded to the south by the Woodrow Wilson Memorial (I-95/I-495) Bridge, at mile 103.8.

(4) Zone 4. All navigable waters of the Georgetown Channel of the Potomac River, 75 yards from the eastern shore measured perpendicularly to the shore, between the Long Railroad Bridge (the most eastern bridge of the 5-span, Fourteenth Street Bridge Complex) to the Theodore Roosevelt Memorial Bridge; and all waters in between, totally including the waters of the Georgetown Channel Tidal Basin.

(5) Zone 5. All navigable waters in the Potomac River, including the Boundary Channel and Pentagon Lagoon, bounded on the west by a line running north to south from points along the shoreline at 38°52′50″ N., 077°03′25″ W., thence to 38°52′49″ N., 077°03′25″ W.; and bounded on the east by a line running from points at 38°53′10″ N., 077°03′30″ W., thence northeast to 38°53′12″ N., 077°03′26″ W., thence southeast to 38°52′31″ N., 077°02′34″ W., and thence southwest to 38°52′28″ N., 077°02′38″ W.

(6) Zone 6. All navigable waters described in paragraphs (a)(1) through (a)(3) of this section.

(1) Entry into or remaining in a zone listed in paragraph (a) in this section is prohibited unless authorized by the Coast Guard Captain of the Port Maryland-National Capital Region. Public vessels and vessels already at berth at the time the security zone is implemented do not have to depart the security zone. All vessels underway within the security zone at the time it is implemented are to depart the zone at the time the security zone is implemented.

(2) Persons desiring to transit the area of the security zone must first obtain authorization from the Captain of the Port Maryland-National Capital Region or his or her designated representative. To seek permission to transit the area, the Captain of the Port Maryland-National Capital Region and his or her designated representatives can be contacted at telephone number 410-576-2693 or on Marine Band Radio, VHF-FM channel 16 (156.8 MHz). The Coast Guard vessels enforcing this section can be contacted on Marine Band Radio, VHF-FM channel 16 (156.8 MHz). Upon being hailed by a U.S. Coast Guard vessel, or other Federal, State, or local agency vessel, by siren, radio, flashing light, or other means, the operator of a vessel shall proceed as directed. If permission is granted, all persons and vessels must comply with the instructions of the Captain of the Port Maryland-National Capital Region or his designated representative and proceed at the minimum speed necessary to maintain a safe course while within the zone.

(3) The U.S. Coast Guard may be assisted in the patrol and enforcement of the security zones listed in paragraph (a) in this section by Federal, State, and local agencies.

Captain of the Port Maryland-National Capital Region means the Commander, U.S. Coast Guard Sector Maryland-National Capital Region or any Coast Guard commissioned, warrant or petty officer who has been authorized by the Captain of the Port to act on his or her behalf.

Designated representative means any Coast Guard commissioned, warrant, or petty officer who has been authorized by the Captain of the Port Maryland-National Capital Region to assist in enforcing the security zones described in paragraph (a) of this section.

Public vessel means a vessel that is owned or demise-(bareboat) chartered by the government of the United States, by a State or local government, or by the government of a foreign country and that is not engaged in commercial service.

(1) In addition to the specified times in paragraphs (d)(2) through (4) of this section, the security zones created by this section will be enforced only upon issuance of a notice of enforcement by the Captain of the Port Maryland-National Capital Region. The Captain of the Port Maryland-National Capital Region will cause notice of enforcement of these security zones to be made by all appropriate means to the affected segments of the public of the enforcement dates and times of the security zones including publication in the Federal Register, in accordance with 33 CFR 165.7(a). Such means of notification may also include, but are not limited to Broadcast Notice to Mariners or Local Notice to Mariners.

(2) Security Zone 4, established in paragraph (a)(4) of this section, will be enforced annually, from 12:01 a.m. to 11:59 p.m. on July 4.

(3) Security Zone 5, established in paragraph (a)(5) of this section, will be enforced annually on three dates: Memorial Day (observed), September 11, and November 11. Security Zone 5 will be enforced from 10 a.m. until 1 p.m. on Memorial Day (observed); from 8 a.m. until 11:59 a.m. on September 11; and from 10 a.m. until 1 p.m. on November 11.

(4) Security Zone 6, established in paragraph (a)(6) of this section, will be enforced annually on the day the State of the Union Address is delivered. Security Zone 6 will be enforced from 9 a.m. on the day of the State of the Union Address until 2 a.m. on the following day.