43 CFR §30.181

1. (a)If the judge has not yet issued a decision, you may renounce a devised or inherited interest at any time before the issuance of the decision.
2. (b)If the judge has issued a decision, you may renounce a devised or inherited interest in any property distributed by the decision:
   1. (1)Within 30 days from the mailing date of the decision; or
   2. (2)Within 30 days of the order on review, in a summary probate proceeding in which a request for review has been filed; or
   3. (3)Before the entry of an order on rehearing, in a formal probate proceeding in which a petition for rehearing is pending.
3. (c)You may renounce a devised or inherited interest that is added to the decedent's estate after the decision is issued pursuant to § 30.251 within 30 days of mailing the distribution order.
4. (d)Once the order on rehearing is issued, you may not renounce a devised or inherited interest that was distributed by the decision.