Rules glossary
↑ Section 712. Double-Faced Cards
712.1 A double-faced card has a Magic card face on one side and either a Magic card face or half of an oversized card face on the other. (It does not have a Magic card back.) There are three kinds of double-faced cards: nonmodal double-faced cards (previously called “transforming double-faced cards”), modal double-faced cards, and meld cards.
No sub-rules.