What’s the mechanism for direct certification (economically disadvantaged)?

We currently use direct certification to identify students from low-income backgrounds in the (BEP). Direct certification aims to remove additional applications for families by generating a list of students who already qualify for SNAP, TANF, or FDPIR or are experiencing homelessness, in the foster care system, migrant, or in Head Start or Even Start. However, many of those programs require applications and have existing eligibility requirements. However, states can add programs like Medicaid  (TennCare) to more inclusively define students from low-income backgrounds.