Can I process the part of the effect after "then" in this card's {Hand} [Main] effect without meeting the "by" condition?
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Official Ruling
No, you can't. If you don't pay 5 cost while you have a Digimon or Tamer with the [CS] trait, the part after "then" in this card's {Hand} [Main] effect can't place this card as the top security card.