can we add pre-tax and After-tax to same element which is employer paid (secondary) ?

Summary:

I have a requirement from the client, where in

For a single plan, Group A Variable profile - Employees will have Pre-tax and Group B Variable profile- Employees will have After-tax benefit and both are employer paid (Secondary).

If I add Standard rate - Not-applicable and Group A Variable rate as Pre-tax and Group B Variable rate as After-tax, will this work? Or should I create separate plans to attach the elements?

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