Owners of towed caravans will face strict control measures later this year.
A new permit system is being implemented - meaning each vehicle will need a valid permit to travel on the Steam Packet.
From November, permits will be issued to owners visiting for the TT Festival, Classic TT or the Southern 100, if they have a return journey within three weeks, or visits to staying at approved campsites.
Drivers may have to follow designated routes from Douglas to the campsites - with restricted travel on the Island's roads.
Journeys booked on or before 1 April 2015 will not be affected and Manx residents will also be required to hold a permit.
New and replacement towed caravans will not be approved.
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