Rules for the use of "z"

[roman]

What to do with artillery z-fire ?

Personally restrict suppressive fire of artillery. Only the assault guns can fire suppression and would be restricted to "distance" of machine guns.
I've noticed that if the artillery fire with the z shortens the time called for artillery which fired hex. Which would expose the enemy fire continued no chance of recovery.

---

I want to repeat a concept.
The use of z is valid. The use of z without restriction is also valid in the sense that it is established as a rule among the players.
It is interesting to establish criteria for restriction we use z as an accessory and non primary.