"Until such time green hydrogen processes are fully developed, blue hydrogen can supplement overall hydrogen supply," Malhotra said.

The phrase being "ammonia ready" is already gaining recognition globally, Brown said.

Platts welcomes feedback on the above issues, including testing methods, and quality specifications.

The Port of Rotterdam's scheme to require bunker vessel operators to hold permits started Feb. 1, as planned, with 24 permits issued covering 143 vessels, it said Feb. 2.