The Maritime and Port Authority of Singapore (MPA) has stated that masters and owners of vessels that exceed the 0.5% sulphur cap after January 1, 2020 could face up to two years in prison. Failing to use an approved abatement technology such as a scrubber, alternative fuel or compliant fuel will result in non-compliance. The authority will inspect both Singapore-registered ships as well as foreign-flagged vessels visiting the port and employ fuel-testing service providers for detailed laboratory analysis of fuel samples. It will also deploy electronic systems for ships to declare their method of compliance before arrival. Along with other nations, Singapore already banned open-loop scrubbers from discharging washwater, the waste liquid containing impurities after airborne sulphur emissions have been removed.