Multi-crew ops for C421

[Dufo]

If an operators manual requires two pilots for commercial IFR JAR-OPS on this aeroplane, is it necessary for the commander of this crew to hold the ATPL license when logging time as PIC+SIC?
The aeroplane minimum flight crew according to aeroplane flight manual is one pilot and both pilots have CPL+ME/IR + MCC.

(ref. JAR-OPS 1 1.955 & 1.960).

Thanks.