Its a bit of a loophole in the CRI.
There are no restrictions on the license. (there wasn't on the one I looked at)
We were discussing this in the pub after it arrived and it appeared that a CRI can do the IMC approaches and sign for them with no additional training and also train someone at night. They can even sign students out solo as long as the student has previously held a license/ rating.
This is after.
1hr of PFL's
1hr of circuits.
1hr of stalling and steep turns.
All because its not training for a new rating/qualification. It really is in it's current form a very powerful rating. For the price of a FI rating, bose-x in the space of 2 weeks over 2 years depending how much instructing he does could be a CRI/CRE SEP/MEP limited to renewals and revalidations. Sign rating pages and do IMC tests.
http://www.caa.co.uk/docs/33/srg_fcl_21_v4.pdf Caa examiner doc
http://www.jaa.nl/publications/jars/563247.pdf JAR-FCL 1 (watch out its big)