What is the code for Union Bank?

Excuse me, I was wondering if you could clarify something for me. I'm trying to make a transaction with Union Bank and I'm having a bit of trouble finding the specific code they require. Is there a unique code associated with Union Bank that I need to input in order to proceed with my transaction? I've checked their website but couldn't find anything definitive. Could you please provide me with the correct code or point me in the right direction to find it? Thank you in advance for your help.