REDU format ruling
Array of Revealing Light

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Declare 1 Type of monster. Any monster of the declared Type cannot declare an attack during the turn it is Normal Summoned, Flip Summoned or Special Summoned.
Rulings
Declare 1 Type of monster. (1) Any monster of the declared Type cannot declare an attack during the turn it is Normal Summoned, Flip Summoned or Special Summoned.
- You declare the Type of monster when you activate this card, not when it resolves. This means you pick the Type before the opponent decides whether to chain or not.
- You cannot change your mind about the Type after you activate this card. The declared Type remains the same as long as this card is on the field.
- The (1) Continuous-like Effect applies while this card is face-up on the field.
- This effect does not target, so the effects of Lord of D. or Frontier Wiseman will not protect monsters from this card’s effect.
- If the Type of a monster is changed (by the effect of DNA Surgery for example) during the turn which it was Summoned, it may attack that turn.
- If a monster of the declared Type is Summoned, then flipped face-down (by Book of Moon) and face-up again (by Book of Taiyou), it CAN attack because the non-attack effect was reset AND because flipping it face-up with Book of Taiyou was NOT a Flip Summon.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.