Talk:Flags/@comment-26021817-20180125013409/@comment-27282915-20180125014336

In an official context, only officially printed flag cards are allowed. However, from what I've heard, "custom flags" are allowed as long as it is discussed first with the head judge, though it is generally agreed upon in the community that you should have an official flag at the ready just in case.

Personally, I've never heard of the blank card ruling you mentioned. I think it might be a stretching of the custom flag ruling I've previously mentioned. The safest bet would be to have an official flag with you, though it sounds like you don't have one.

Of course, this only really applies to Bushiroad regionals and beyond. Shop tournaments generally do whatever they want.