What is a necessary requirement for the director's orders to be valid?

For the director's orders to be considered valid, it is essential that they be in writing and signed. This requirement ensures a clear and formal record of the orders issued, which can help in maintaining accountability and transparency in the administrative process. Written documentation serves as proof of the directives given, allowing for verification and reference in the future. It is a standard practice in regulatory frameworks to formalize orders this way, as it helps to uphold the integrity of the regulatory body and fosters trust among the stakeholders involved.

Other options do not fulfill this critical requirement. Verbal communication does not provide a reliable record of the orders, approval by the governor is not a standard prerequisite for all director's orders, and publication in a state document, while potentially beneficial for public awareness, does not constitute a necessary condition for validity. The emphasis on written and signed orders protects the rights of all parties and the legality of the directives issued by the director.