Gene R. Elerding provided us with an excellent FREE tool in the BOL Tools page. Look at The Check Guide and search on "60" and you'll see this, which I think is what you're after.
Unauthorized Transactions. You are in the best position to discover and report any unauthorized charge to your account. If you fail to notify us within a reasonable time (not exceeding 21 days after your statement date) of an unauthorized signature, alteration, forgery, counterfeit check, or other unauthorized debit to your account, we will not be responsible for subsequent unauthorized transactions by the same wrongdoer if we act in good faith. Without regard to care or lack of care of either you or us, if you do not discover and report any such unauthorized transaction within [60 days] [six months] after your statement, transaction information or the item is made available to you, you are precluded from asserting the unauthorized transaction against us. (Note: Different notification and liability rules apply to certain electronic fund transfers. See page ___.)
The UCC cites are next to that section for more explanation.
http://www.bankersonline.com/tools/training/ucc3_4trng_ge.html