The Centers for Medicare & Medicaid Services announced announced four concepts that states can use to promote health coverage options under Section 1332 of the Affordable Care Act: account-based subsidies, state-specific premium assistance, adjusted plan options, and risk stabilization strategies.
The announcement can be obtained at https://www.cms.gov/CCIIO/Programs-and-Initiatives/State-Innovation-Waivers/Downloads/Waiver-Concepts-Guidance.PDF.