The summary plan description of the CAP plan is
Capitol accumulation plan is a non qualified deferred compensation plan. Designed to enable you to defer portions of your compensation into the future on a pretax basis. Allows you to accumulate earnings on your deferrals on a tax deferred basis. I.e. Not subject to income tax until distributed to you. It is subject to social security and Medicare taxes at the the time you defer them. Not a 401A