Making a mod that allows casting spells while wearing armors...

Hello.

I have a question for modding.

I'm now planning to make a mod for rebalancing classes/kits, and my first plan is to revise Bards.

I want to give Armored Arcana-like effect which reduces the spell casting failure chance while wearing armor to Bards, by allowing spell casting while wearing Light armors (Leather, Studded, and Hide, gradually according to Bard's level up)

However, as far as I know, the spell casting possibility (opcode) depends on armors, not characters... As a result, it seem that every armors, instead of Bard class/kits, should be modified for the implementation (Honestly, I'm not sure the implementation what I intend to do is really doable because of the gradual armor usability for allowing spell casting).

Could Such thing be implementable?