The Director of Pesticide Regulation shall be designated by the board as its agent for the purposes of carrying out Section 8616.4. The board and the Department of Pesticide Regulation shall jointly develop a training program specifically relating to the various aspects of structural pest control and train all county agricultural commissioners and other personnel involved in structural pest control investigations and enforcement. No disciplinary action pursuant to Section 8617 may be taken by a county agricultural commissioner until training has been completed.