Nevertheless, OACTU staff will expect individuals to have prepared to such a level where they are aiming to achieve the Green standard - although Amber is still classed as acceptable.
It might be, on paper, 'acceptable, but if you're on IOT and consistently only getting Amber, you will not be highly regarded and you will be warned - facing possible sanctions - for poor performance.
This is from direct, recent experience of the OACTU system (and I'm not for one minute suggesting that it's a bad thing, either, just letting people know).