The agreement drawn up, which enters into force with effect from 1 April 2008, does not provide any contingency for a situation where all three River Class vessels are unavailable for fishery protection duties. In discussion with the Ministry of Defence, the Marine and Fisheries Agency considered that the risk of having no fishery protection cover for any lengthy period was low. Nonetheless, the Ministry of Defence would seek to provide suitable replacement patrol vessels if there is extended “time off task” by one of the River Class Patrol vessels.