Frozen 403(b) and Rollover Contributions

[Guest AEA]

I also posted this on the 401(k) board as it is an for two different plans.

Is it possible to freeze an elective deferral-only plan to future deferrals and participation, but allow employees (including new ones) to rollover contributions from other plans into the frozen plan? My concern with the 403(b) is not just the "is it really frozen" but also the universal availability rule.

I feel like I should know this, but I can't find any discussions - either general or 403(b) specific.

Thanks in advance