Children's Health Insurance Protection (CHIP) Act - Amends XIX (Medicaid) of the Social Security Act with respect to the income level of certain children born after September 30, 1983 (or, at the option of a state, after any earlier date), who are between 6 and 19 years of age. Maintains the income level at 100% of the income official poverty line applicable to a family of the size involved by repealing the increase to 113% of the poverty line scheduled to begin January 1, 2014.