Section 1419. Process; renunciation or exclusion of persons having prior or equal right Every eligible person having a right to letters of administration with the will annexed prior or equal to that of the petitioner including an infant, incompetent or conservatee whose guardian, committee or conservator would be entitled to letters, and who has not renounced, must be served

The proceedings upon the application are the same as
  upon an application for administration upon the estate of an  intestate.
  The  court  may  dispense  with the issuance and service of process upon
  non-domiciliaries.