1.  Opportunity for hearing.  Subject to the provisions of section 10004, an agency may not amend or modify any license unless it has afforded the licensee an opportunity for hearing in conformity with subchapter IV, nor may it refuse to renew any license unless it has afforded the licensee either an opportunity for an agency hearing in conformity with subchapter IV or an opportunity for a hearing in the District Court. In any such proceeding determined by the agency to involve a substantial public interest, an opportunity for public comment and participation must also be given by public notice in conformity with subchapter IV.  

2.  Proceeding.  In any proceeding involving a proposed modification or amendment of a license which was the subject of an earlier hearing, the agency shall give notice thereof to all parties to the earlier proceeding and in any other manner required by section 9052, and may reopen the earlier proceeding for consideration of the proposed amendment or modification.