3.1 All Certificates (whether of competency or
service), Boatmaster's Licences and Local Authority Licences must
be revalidated every five years. To revalidate, the applicant must
prove at least 150 days of actual sea service on appropriate vessels
during the previous five years and be in possession of a valid Medical
Fitness Certificate.
3.2 Applicants for revalidation who are not able
to prove the requisite sea service but are able to demonstrate that
during at least half of the five year period they have been employed
on duties closely associated with the management and operation of
one or more of the appropriate types of vessels, may have their Certificates
or Licences considered for revalidation.