; and (ii) provide training resources to eligible child care providers and information to families to support the prohibition of practices described in subclauses (I) and (II) of clause (i). (M) Multitiered systems of support The State plan shall provide an assurance that the State will provide assistance to eligible child care providers to implement multitiered systems of support such as systems with positive behavioral interventions and supports, infant and early childhood mental health consultation and trauma-informed care that promote positive social and emotional development and reduce challenging behaviors. (N) Enrollment practices (i) In general The State plan shall describe how the lead agency will ensure that families have access to a low-barrier enrollment (including re-enrollment) process that is accessible to and minimizes burdens for families with diverse characteristics, by implementing activities such as allowing for simplified enrollment for siblings, coordinating with other State agencies to streamline enrollment processes across public assistance programs, requiring minimal paperwork, allowing for enrollment through a State or local website, and providing flexible submission deadlines. (ii) Definition In this subparagraph, the term family with diverse characteristics includes families with adults with disabilities, with children with disabilities, or with infants and toddlers with disabilities, families experiencing homelessness, families with limited access to internet connectivity, families living in rural areas, families of dual language learners, and families with children in underserved populations identified under subparagraph (I). (O) Implementation for low-income families The State plan shall include a certification that the applicant, not later than October 1, 2024, will provide assistance described in subsection (d)(2) to every child in the State who is described in that subsection, and is from a family with a family income of not more than 85 percent of the State median income for a