So It's against the rules to need for another job?....

[Felis]

Technically you shouldn't have needed on it anyways because it's DRG armor. It's pretty useless to you; SE just lets you Need on it anyways.

Aetherial Steel Scale Greaves

Defense 56, Magic Defense 56
Strength 4, Vitality 4
Item Level 32, Required Level 32
Requires GLA MRD LNC PLD WAR DRG

I think what you mean is this:

Aetherial Steelclad Boots

Defense 28, Magic Defense 28
Strength 4, Dexterity 4, Vitality 4
Item Level 32, Required Level 32
Requires Disciple of War