Section 447 Of Article 4. Vessel Traffic Service From California Harbors And Navigation Code >> Division 3. >> Chapter 1. >> Article 4.

. The following vessels, while transiting the VTS area, shall comply with the requirements of Section 447.5:
  (a) Every power-driven vessel of 20 meters or more in length.
  (b) Every vessel of 100 gross tons or more carrying one or more passengers for hire.
  (c) Every dredge and floating plant.