I am sitting with the same question. I must submit training reports to Head Office on a monthly basis. The report must indicate the OFO code for each occupation. As a Training Centre I use OFO Codes of Artisan Trades for my Apprentices. Our HRD department in turn is also using OFO Codes for specific trades, addressing Apprentice Training in their WSP to PSeta. We had no feedback or questions about this from PSeta. Thus we assume that we are doing the right thing. If someone has a concrete answer regarding this aspect, please share.