The 'national responsibility' comes from:
http://www.jaa.nl/jar/jar/jar/jar.fcl.1.020.htm
NB - In JARspeak, 'will' means something is going to happen no matter what, 'shall' means that something is a mandatory requirement and 'should' means that something is a recommendation only.
Experienced non-military pilots from other countries with appropriate qualifications who wish to apply for JAR-FCL ATPLs restricted to UK-registered aircraft may be rather interested in this latest little snippet from the CAA SRG:
http://www.srg.caa.co.uk/documents/srg_fcl_News_item_N o1.pdf
[ 21 July 2001: Message edited by: BEagle ]