Historical Rules · 25 August 2017
Rule 712.3c
Official source text from the 25 August 2017 Rules release
Anything that needs information about a meld card or a melded permanent sees only the information given by the face that is currently up. Example: A Clone enters the battlefield as a copy of Chittering Host (the combined back face of a meld pair). It has the characteristics of Chittering Host, even though the object it becomes is represented by only a single card, and its convered mana cost is 0.