(a) If the case is designated as a formal probate proceeding, OHA will send a notice of hearing to:

(1) Potential heirs and devisees named in the probate file;

(2) Those creditors whose claims are included in the probate file; and

(3) Other interested parties identified by OHA.

(b) In a case designated a summary probate proceeding, OHA will send a notice of the designation to potential heirs and devisees and will inform them that a formal probate proceeding may be requested instead of the summary probate proceeding.