Physiological beaks are well covered in the ops manual. As is the recording of flight time and the experience required for training post holders.
It is safe to say that how hours are logged in the case of a B747 flight crew for example will have little relevance to the discussion regarding teaching of IMC and IR elements in single pilot aircraft.
Remember that a multi pilot IR does not confer any single pilot privileges.
Thus my comments previously about what is logged stand.
We do not carry a stop watch that is started when we enter IMC, paused when we exit and then re-started on going IMC again etc etc! The recording of instrument flight time is very much down to judgement and memory. It is also very hard to check. The recording of IFR time however is easy and can be easily checked after the event.
Regards,
DFC