(a) The area. An area in the main channel in Flushing Bay extending for a distance of 300 feet on either side of the extended center line of Runway No. 13-31 at La Guardia Airport.

(b) The regulations. (1) All vessels traversing the area shall pass directly through without unnecessary delay.

(2) No vessels having a height of more than 35 feet with reference to the plane of mean high water shall enter or pass through the area whenever visibility is less than one mile.