cart's original question related to whether a "CFI" could log for currency purposes the approaches performed by the presumably current Pvt-Instrument in the left seat. No further info was given as to whether the CFI was "acting as an authorized instructor" as would be required for the logging of PIC time by the instructor, but I think we reasonably assumed he was aboard in some instructor capacity. The responses applied "PIC" definitions to determine if the "CFI" could log Private's actual IMC approaches for his own currency. Interestingly, although there may interpretive decisions/opinions on the subject(?), the IFR currency requirements set forth in 61.57(c)(1) do not speak of "PIC". Rather, in terms of 61.57(c)(1) currency, the requirement is that the pilot seeking to extablish his currency have "performed" the approaches "for the purpose of obtaining instrument experience in an airraft". 61.57(c)(1). Query: meaning of "performed" for purposes of IFR currency? And in relation to CFI logging thereof for IFR currency on the facts of cart's hypo and generally?
Also: I still find the use of the term "authorized instructor" worthy of note in its various contexts. For example, 61. 195(c) requires the instructor who provides flight training for the issuance of an instrument rating (not cart's hypo where Pvt. already rated) to be CFII, but 61.195(d)(6) does not expressly require the instructor giving an instrument proficiency check to be CFII and 61.57(d)(2)(iv) simply requires IPC endorser to be "an authorized instructor."
The multi make and model requirement 61.195(f) is, as midlifeflyer states, very specific. However, 61.63(c)(1) for multi rating simply requires "an authorized instructor". My point is that the term "authorized" has import. As for CFI single I's teaching in instrument course, I believe in 141-142 schools the courses in each instructor may teach are specified in the school records, etc. I guess the main question this time around is "performed" and "for the purpose of obtaining instrument experience" in 61.57 (c) (1) especially as to cart's hypo. And meaning of "authorized flight instructor" in different contexts.