It doesn't matter what JAR says - JAR ended June 30th 2009 however it is :
Appendix 1 to JAR–FCL 1.300
Requirements for a specific authorisation for instructors not holding a JAR–FCL licence to instruct in a TRTO outside JAA Member States or in a FTO partial training outside JAA Member States in accordance with Appendix 1b to JAR-FCL 1.055
Standards Document 39 3.6.1 - governs PPL training for a UK FTO.
Groundloop - do tell....