Final answer:
The correct protocol before a hearing is for a notice to be sent to the producer detailing the charges, following due process and fair trial standards.
Step-by-step explanation:
Before a hearing is held by the commissioner against a producer, a notice should be sent to the producer detailing the charges. This is in accordance with the principles of due process, which require that individuals be informed of the nature and cause of the accusation against them.
In criminal justice systems, this ensures the right to a fair trial and the opportunity for a defense. These principles extend to administrative proceedings as well, where parties must be given notice of any allegations and have an opportunity to respond.