The Maritime Labour Convention, 2006 was not established and monitored by the IMO, but by the International Labour Organisation (ILO). The broad picture described by the ILO placed the MLC as the ‘fourth pillar’ of maritime regulation covering international shipping, alongside the Convention for the Safety of Life at Sea (SOLAS), the Convention for the Prevention of Pollution from Ships (MARPOL), the Convention for the Training, Certification and Watchkeeping of Seafarers (STCW). Since then, of course, a fifth pillar has been established with the Convention for the Control and Management of Ships’ Ballast Water and Sediments (BWM).