Appendix 1 specifies the conditions of the check-ride, acceptable test criteria, tollorances, etc.
Appendix 2 specfies the content of the test on a multi-pilot aircraft.
Appendix 3 specfies the content of the test on a single-pilot aircraft.
Navigation (section 3A of appendix 3) is not a mandatory test, hence examiner discresion.
http://www.jaa.nl/publications/jars/607069.pdf Appendix 3 is on page 161.
Took me a while to find this as I'm renewing an expired (by two weeks) SEP rating on Monday!