Its dependant upon your role within the "Court Martial". If a material witness yes would be the answer. Also depends on the type of CM you are attending, if it is a GCM it will last longer than a DCM. Hope this helps.
Why don't you ask them?
Instead of posting that sort of stuff on here. Unless you want everyone to know you're going to a court martial so that they'll ask you lots of questions and you'll feel special.
I thought when i was in the military that the writers were unreliable, ok so the military full stop is like that and takes time. But now from a civvy view bugegr me how does the military get anything done at all?