Example. Employer A maintains a single profit-sharing plan, Plan W, and three pension plans, Plans X, Y and Z, each benefiting employees of a different one of Employer A's three qualified separate lines of business. Contributions to the profit-sharing plan are made pursuant to a cash or deferred arrangement in which all employees of Employer A are eligible to participate. Assume that, as a result, Plan W satisfies the requirements to be tested under this paragraph (c)(2)(ii). None of the pension plans benefits more than 70 percent of the nonexcludable nonhighly compensated employees of Employer A. Employer A is treated as operating qualified separate lines of business for purposes of applying section 410(b) to its qualified plans. The requirements of sections 410(b) and 401(a)(4) must therefore be applied to Plans X, Y and Z separately with respect to the employees of each of the three qualified separate line of business operated by Employer A. Since Plan W benefits at least 70 percent of the nonexcludable nonhighly compensated employees of Employer A, however, the requirements of sections 410(b) and 401(a)(4) (including section 401(k)) may be applied to Plan W on an employer-wide basis.
26 C.F.R. §1.414(r)-1