Is point 145.A.30(g) applicable to a maintenance EAC organisation in the same terms, i.e. the figure of the certifier trained for specific tasks in EAC organisations?

EASA Response "The original intent of the task-trained certification staff was to provide relief to certification personnel requirements for maintenance organizations that have multiple line maintenance stations away from the main base. 

This scenario was particularly adapted to Part-145, which is the type of organisation required for authorised air carriers (and CMPAs), which normally use such line stations. This is why points 66.A.20(a)(1) and 66.A.20(a)(3)(ii) (for task-trained CS) only refer to Part 145. 

And, accordingly, this means that the CAO Party cannot propose qualified certification personnel for such a task.  

However, it should be noted that for general aviation other exemptions are allowed, such as B2L, B3 and L licences.