You can choose to reroll any Perception check, but the result of the reroll must be accepted even if it is worse.
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You can choose to reroll any Perception check, but the result of the reroll must be accepted even if it is worse.
You may reroll any Perception check but must accept the result even if it is worse.
A Bith can choose to reroll any Perception check, but the result of the reroll must be accepted even if it is worse.
A Rodian may choose to reroll any Perception check, but the result of the reroll must be accepted even if it is worse.