to confirm what Vitor said, it’s the logistics companies not the port that had a rules change: “The rule change does not apply to terminals at the Port of Long Beach, which routinely stack containers up to six high. Many media reports over the weekend didn’t make a distinction between the port and inland zone, making it appear the port had new authority to increase vertical storage.” - https://www.freightwaves.com/news/city-of-long-beach-allows-logistics-companies-to-stack-containers-higher
to confirm what Vitor said, it’s the logistics companies not the port that had a rules change:
“The rule change does not apply to terminals at the Port of Long Beach, which routinely stack containers up to six high. Many media reports over the weekend didn’t make a distinction between the port and inland zone, making it appear the port had new authority to increase vertical storage.”
- https://www.freightwaves.com/news/city-of-long-beach-allows-logistics-companies-to-stack-containers-higher
If anyone wants to double-check this without dealing with the paywall, here’s the 12ft link.