(a) To enforce the provisions of this article.
(b) To enter the premises of any licensee at reasonable times for the purpose of inspecting the same, and determining the compliance of said licensee with the provisions of this article and any rules and regulations promulgated by the commissioner pursuant to the provisions of this article.
(c) To promulgate such reasonable rules and regulations as may be necessary for the execution and enforcement of the provisions of this article, which may include, but shall not be limited to, the hours during which licensees may sell alcoholic liquors, and the use, handling, service and sale of such alcoholic liquors. Such rules and regulations shall be promulgated in accordance with the provisions of article three, chapter twenty-nine-a of the code in like manner as if said article three of said chapter twenty-nine-a were set forth in extenso in this subdivision.
(d) To issue subpoenas and subpoenas duces tecum for the purposes of conducting hearings under the provisions of section thirteen of this article, which subpoenas and subpoenas duces tecum shall be issued in the time, for the fees, and shall be enforced in the manner specified in section one, article five, chapter twenty-nine-a of this code with like effect as if said section one were set forth in extenso in this subdivision.
The authority granted in subdivisions (a), (b), and (d) of this section may also be exercised by the duly authorized agents of the commissioner.