FCL.900 (a) General (1) (ii) "An instructor must hold a certificate
appropriate to the instruction being given"
And a CRI may give instruction for type or class rating issue renewal and revalidation. Please tell me where it specifies at what time of day this most be done.
The CAA can not be any more stringent than the basic regulation. If the conditions are not specified it is not up to to the CAA to make them up.