After a proceeding is converted from one type to another, the presiding officer or other agency official responsible for the new proceeding shall do all of the following:
(a) Give additional notice to parties or other persons necessary to satisfy the statutory requirements relating to the new proceeding.
(b) Dispose of the matters involved without further proceedings if sufficient proceedings have already been held to satisfy the statutory requirements relating to the new proceeding.
(c) Conduct or cause to be conducted any additional proceedings necessary to satisfy the statutory requirements relating to the new proceeding, and allow the parties a reasonable time to prepare for the new proceeding.