Art Regan, the chief executive of US tanker operator Principal Maritime, singled out ballast-water legislation as a particularly worrisome proposition for many operators during the Connecticut Maritime Association’s annual conference in Stamford.

Regan argued that the cost of compliance, which will hinge on the installation of ballast water treatment systems, could cripple cash-strapped owners if regulators don’t proceed with caution during the implementation phase of the initiative.

“Regulation