A notice of a hearing on an alleged unfair trade practice must be served how many days in advance?

The requirement for the notice of a hearing on an alleged unfair trade practice to be served 15 days in advance is established to ensure that all parties involved have adequate time to prepare for the hearing. This advance notice is a critical part of due process, allowing the accused party to understand the allegations being made against them and to gather necessary evidence or legal representation. Providing a 15-day notice balances the need for both timely resolution of complaints and the rights of individuals to defend themselves.

Other options suggest longer notice periods, which might not be practical or necessary for such hearings, while shorter notice periods could compromise the ability of parties to adequately prepare. The specified 15 days strikes an appropriate balance, making it the correct answer.