The UCC remains firmly in place. Check 21 rules create an umbrella of additional rules that will affect substitute checks (SCs) only, and only in specific situations.
For example, if an SC is presented for payment against insufficient funds, the UCC (and Regulation CC) will continue to govern how quickly the drawee must return the item or become accountable for it.
But if a consumer received an SC and has a specific SC warranty claim, Check 21 rules in Subpart D of Regulation CC will govern how that warranty claim operates.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8