Warning on exhaust gas scrubber water discharge

The P&I Club Guard has issued warning on the regulations for discharge of scrubber water in various locations:
http://www.gard.no/web/updates/content/26939066/beware-of-local-restrictions-before-discharging-washwater-from-exhaust-gas-scrubbing
More rules and regulations for mariners to stay on top of.

I think it is a moot point. Most open-loops scrubbers likely won’t be used in port because the ship will be burning low sulfur fuel.