Drill and attention

[AlexCorbin]

Speaking on parade

Hi, So a few years ago on a drill course I was told not to come to attention when answering a question whilst on parade by my then WWO. Recently my NCOs were on a course with the new WWO and were told to come to attention when speaking to staff. What do the regs (RAFAC WO) say? TL;DR: How should one answer a staff’s question whilst on parade?