The determination by the director of freezing damage to oranges as required by Section 1430.40 shall be based upon an investigation of the condition of the fruit in the areas of the state where freezing damage to oranges has occurred.

Dates A and B, as defined in Section 1430.40 shall be established by the director in writing, after survey, and the period of time established by such dates shall be effective throughout the state unless the determination of the director shows that such action will be contrary to the public interest, in which case such dates shall apply to as large an area as will be practical.

During the period from date A to date B when, according to Section 1430.40, freezing damage in oranges shall be determined (a) by examination for damage on the segment walls, or (b) by examination of the exposed pulp on a transverse cut through the center, or by both such examinations, each individual orange in an official sample, if found to have less damage than “serious damage due to freezing” (Section 1430.39) by one method of examination, shall also be examined for damage by the other method. The total of the seriously damaged fruits found by either method shall be scored separately. The type of damage found to be the most serious shall determine the percentage of seriously damaged fruit in each lot.