The main purpose of this legislation is to update the Child Nutrition Act of 1966 to give participants in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) the option to choose from a variety of milk types, including whole milk. This change aims to improve nutrition for children and ensure they receive adequate dairy intake, which is important for their health and development. Key provisions of the legislation include allowing individuals in the WIC program, or their parents or guardians, to select the type of milk they receive.