Each board shall allocate a portion of the board’s federal child care development funds dedicated to quality improvement activities to a competitive procurement process for a system for quality child care for children under four years of age that encourages child care providers to voluntarily meet the certification criteria of the commission’s Texas Rising Star Program. In allocating funds under this section, special consideration shall be given to funding child care for children under four years of age in low-income communities. This section may not be interpreted to limit parental choice.