Yes. In place since 1985, the voluntary exclusion zone will continue to be enforced. We've had U.S. co-operation ever since the program began. It's primarily for tankers carrying large quantities of oil from Valdez, Alaska, to ports along the U.S. coast. However, oil tankers carrying 12,500 metric tons of oil or less will travel inside the exclusion zone in order to supply small communities.
On October 19th, 2017. See this statement in context.