Use separate codes or a single-supported threshold

Supported alternatives: (1) Create two Advanced Discount Code campaigns (one code for 25% with minimum item quantity = 1, and a second code for 30% with minimum item quantity = 2). Customers would enter the appropriate code. (2) If you must use a single code, choose one supported rule such as a single Order Discount that applies 30% off with minimum quantity = 2 (or 25% off with minimum quantity = 1).