Next thing u'll see implemented in FCOM3 is the EXACT order to put ur uniform on starting from ur undies. This will be checked during ur RT/PC and will be graded on. Failure to achieve the "Cathay Standard" will result in a meeting with your fleet training manager and additional training will be provided.
Being a "Captain's Airline", of course the captain knows best about whether his F/O's need to wear a jacket or not, and as previously testified, S/O's are simply not capable of doing much of anything so who cares about how they feel. A new QRH checklist will be created for all captains to determine whether they should wear a jacket themselves.This is neccessary cause we're not professionals in determining whether it's cold enough for us to put on a jacket or not as an individual and would require some sort of standard across the company.
And of course, if you go sick because your captain wasn't wearing a jacket and hence you weren't, you should consult your physician whether or not to consider a career change.