There are very few true "store cards" left out there, they are bank cards. Also the UCC primarily deals with the sale of goods between merchants. There are a few consumer related provisions, (auto's etc") however section 2-108 gives a baseline in that the UCC applies except in cases where the transaction is subject to other law. In that case the CPLR would apply. This would include consumer credit transactions. I don't believe that the UCC speaks to "store cards" anymore, so that NYC civil website appears to be outdated.