Is that your Notified Body audit? or a customer auditing you to ISO 9001 requirements?
If you have been told "corrective actions are due within 30 days of the audit" then that is usually just the action plan is due rather than a fully completed an implemented corrective action.
As corrective action will usually include some form of verification of effectiveness. It could well be impossible to open, design, implement and verify the effectiveness of the implemented actions of a non-conformance, all within 30 days depending on the processes impacted.
If, however, you are unsure; the best course of action is to go back to your auditor and ask. They are people too! and will usually respond well to clarification requests.