Permissively Aggregate with a Union Plan

[Oh so SIMPLE]

If a company contributes to a union retirement plan for its employees covered by a CBA, may the company's 401k plan include its union-covered employees and permissively aggregate with the union retirement plan, considering just the union-covered employees working for that company and count the company contributions to the union retirement plan in the nondiscrimination testing of the company's 401k plan?

[PensionPro]

I think there was a similar thread not too long ago ... http://benefitslink.com/boards/index.php?showtopic=47994