(b) The order of the commissioner reversing, modifying or annulling
any such rule, regulation, direction, order, ordinance or requirement,
shall state the date on which it takes effect and a copy thereof, duly
signed by the commissioner shall be filed as a public record in the
department.
(c) Nothing contained in this article shall affect any existing rule,
regulation, direction, order, ordinance or requirement relating to the
dating of milk in cities.