Incentivize or Excluding Coverage If Spouse Has Coverage

[401_4_ever]

Outside of the Medicare Secondary Payer rules, are there any rules out there that would prevent a company from either (1) excluding employes from coverage if their spouse works for a company that offers them coverage, or (2) offering cash incentives to not take coverage with the employer and instead take it with spouse's employer?

I'm also aware of the pay or play effects (1) would have under ACA -- wondering if there is anything else in the universe to worry about.

Thanks for the help.