Three conditions when joker in the army

Officer: We need you in the army.

Joker: I'll join but on three conditions.

Officer: Ok. what are the conditions?

Joker: My first condition is that I'll not wear the uniform because it is hot.

Officer: Ok. What is the second condition?

Joker: I'll not do the perade and other training under the sun because it is hot. I'll only do it under the shed or some kind of shadow cover.

Officer: Ok. What is your third condition?

Joker: And my last and most important condition is that during war times, I'll remain on leave.