Croatia:

The skipper must have a valid license for the appropriate boat size as required by Croatian maritime law.
VHF license is obligatory.

Greece:

The skipper must have a valid license for the appropriate boat size as required by Greek maritime law. A co-skipper must also sign, but is currently not subject to licensing.
VHF license is not mandatory.

Spain:

The skipper must have a valid license for the appropriate boat size as required by Spanish maritime law.
VHF license is obligatory.

BVI:

A skipper license is not required, but we insist on proof of qualification. Only under exceptional circumstances do we approve a charter without a licence customary in the country.
VHF license is not mandatory.