Unvested Employer Contributions
Only vested balances can be awarded to an alternate payee spouse. The California Industrial Rubber Co.., Inc.. 401(k) Profit Sharing Plan may use a graded or cliff vesting schedule. So, if your ex-spouse hasn’t been with the company long enough, part of their employer-funded account may not belong to either of you yet.
In your QDRO, make sure you specify whether the division should apply only to the vested balance or also to future vesting, if supported by the plan.

