§ 252. Division of milk control. There shall be in the department a division to be known as the division of milk control. The head of the division shall be a director who shall be appointed by the commissioner and serve during his pleasure. The functions, powers and duties of the department, as provided by this article, and by article four of this chapter, shall be exercised and performed therein by and through the division of milk control. The commissioner may delegate any of his powers to, or direct any of his duties to be performed by the director of the division of milk control.