(a) Contests may be initiated by any person seeking to acquire title to or claiming an interest in the land involved against a party to any desert-land entry because of priority of claim or for any sufficient cause affecting the legality or validity of the claim not shown by the records of the Bureau of Land Management.

(b) Successful contestants will be allowed a preference right of entry for 30 days after notice of the cancellation of the contested entry, in the same manner as in homestead cases, and the authorizing officer will give the same notice and is entitled to the same fee for notice as in other cases.