(a) to cause an investigation to be made to determine the wages prevailing in any locality in all crafts, trades and occupations involved in service work; in making such investigation, the fiscal officer may utilize wage and fringe benefit data from various sources including, but not limited to, data and determinations of federal, state or other governmental agencies;

(b) to institute and conduct inspections at the site of the work or elsewhere in aid of the effective administration and enforcement of the provisions of this article;

(c) to examine the books, documents and records pertaining to the wages paid to, and the hours of work performed by, service employees;

(d) to hold the hearings provided for in this article, and in connection therewith to issue subpoenas, administer oaths and examine witnesses. The enforcement of a subpoena issued under this section shall be regulated by the civil practice law and rules;

(e) to make a classification by craft, trade or other generally recognized occupational category of the service employees involved and to determine whether such work has been performed by the employees in such classification;

(f) to require a contractor to file with the fiscal officer a record of the wages actually paid by such contractor to the employees and of their hours of work;

(g) to delegate any of the foregoing powers to his deputy or other authorized representative;

(h) to provide such reasonable limitations from any or all provisions of this article as he may find necessary and proper in the public interest or to avoid serious impairment of the conduct of government business;

(i) to propose, and after public hearing held before him or his designee, to promulgate such rules as he shall consider necessary for the proper execution of the duties, responsibilities and powers conferred upon him by the provisions of this article. Such rules may allow such reasonable variations, tolerances and exemptions to and from any or all provisions of this article as the fiscal officer may find necessary and proper in the public interest, or to avoid serious impairment of the conduct of government business. 2. For all work for which the industrial commissioner is the fiscal officer, the industrial commissioner shall additionally have all the powers granted him elsewhere in this chapter.