There aren't that many changes.
The instructor has to hold at least the license he's giving instruction for.
A foreign EASA/JAA examiner can conduct LST's or LPC's if received a briefing from the competent authority and notifies the competent autority of his intention do perform the test.
FCL.1005 (a) states that for skill tests and assessment of competence for the issue
of the licence, rating or certificate, the examiner must not have provided flight
instruction. Therefore this paragraph applies for the issue of ratings, IRs or for the
instructor and examiner certificates but not for revalidation or renewal.
FCL.1005 (b) introduces the ‘proficiency check’ and obliges the examiner not to
conduct any test, check or assessment of competence if their objectivity may be
affected.
Therefore:
a) Examiners may not provide instruction on any applicant who requires a skill test
or assessment of competence for the issue of a licence, rating or certificate;
b) Examiners who may have their objectivity affected may also not conduct any skill
test, proficiency check or assessment of competence for issue, renewal or
revalidation;
(i) a declaration that the examiner has received information from the
applicant regarding his/her experience and instruction, and found that
experience and instruction complying with the applicable requirements
in this Part;
(ii) confirmation that all the required manoeuvres and exercises have been
completed, as well as information on the verbal theoretical knowledge
examination, when applicable. If an item has been failed, the examiner
shall record the reasons for this assessment;
(iii) the result of the test, check or assessment of competence.
(c) Examiners shall maintain records for 5 years with details of all skill tests,
proficiency checks and assessments of competence performed and their
results.
(d) Upon request by the competent authority responsible for the Examiner
Certificate, or the competent authority responsible for the applicant’s licence,
examiners shall submit all records and reports, and any other information, as
required for oversight activities.
May 2012
CAP 804 Part I Flight Crew Licensing: Mandatory Requirements, Policy and Guidance
Section 4 Part K, Subpart 0 Page 6
c) An examiner may provide instruction on any applicant who requires a proficiency
check for the revalidation or renewal of a rating or IR;
d) An examiner conducting an LPC/OPC or IR revalidations or renewals may provide
refresher or remedial training to the applicant prior, during or post a proficiency
check.
I do think it's better to have Flight Crew Licensing in European Law instead of every JAA State doing their own thing with lots of exemptions possible.