Changing the retiree COBRA coverage from self-insured to insured after employer bankruptcy?

[taxllm]

The employer went trough chapter 11 bankruptcy; it has a self-insured plan for active employees. Before bankruptcy it offered retiree medical plan. Now, it has to offer the retirees COBRA coverage for life. Can the employer offer the retirees an insured plan and the active employees the same self-insured plan? Assume that the insured and self-insured plan offers the same benefits and coverage but the premiums for the insured plan are higher then the self-insured plan. The retirees would get the same benefits and coverage but would pay a higher premium than active employees. Is this allowed?