Alliance War Rules

Can someone explaine me about war rules? Is it rule/bonus for both, or just for enemy?

From Release Note: War Rules added. Each war now has a specific War Rule in effect. War Rules change how the enemy team is supported during battles.

Now i see + under enemy’s Alliance name during the battle.

Question: If this rule is for both, why not to write THE RULE OF THE WAR IS ENEMY AID or 2 others. Why to mention only enemy is supported? Or our bonus is not the same?

Bonus is the same for both. The enemy part is to indicate that only the defending team gets the bonus.