. (b) Effective date The amendments made by this section shall apply to items and services furnished on or after January 1, 2019. 3. Grant program to expand youth addiction treatment facilities under Medicaid and CHIP (a) Establishment (1) In general The Secretary shall establish a program under which the Secretary shall award grants to States for the purpose of expanding the infrastructure and treatment capabilities, including augmenting equipment and bed capacity, of eligible youth addiction treatment facilities that provide addiction treatment services to Medicaid or CHIP beneficiaries who have not attained the age of 21 and are in communities with high numbers of medically underserved populations of at-risk youth. (2) Use of funds Grant funds awarded under this section may be used to expand the infrastructure and treatment capabilities of an existing facility (including through construction) but shall not be used for the construction of any new facility or for the provision of medical assistance or child health assistance under Medicaid or CHIP. (3) Timetable for implementation