[Rules] 5.63 Limbering and Unlimbering

[Hugmenot]

Are mortars subject to this rule?

Mortars are defined as Personnel Unit under Rule 1.2. As Rule 5.63 refers to Weapon Units specifically, I am uncertain whether flipping a mortar unit to its limbered or unlimbered side cost its whole activation.

The house rule I have been using is 81mm mortars can be flipped as their first action in their activation and then fire or move as part of the same activation. My assumption here is that small mortars can be set up/dismantled very quickly but that is just that, an assumption.