New York Consolidated Laws, Labor Law - LAB § 33. Service of notice

Whenever the commissioner or board or any person affected by the provisions of this chapter is required to give notice in writing to any person, such notice may be given by mailing it in a letter addressed to such person at his last known place of business or by delivering it to him personally.  Notice to a partnership may be given to any of the partners and notice to a corporation may be given to any officer or agent thereof upon whom a summons may be served as provided by the civil practice law and rules.  Whenever an order or demand of the department is required to be served it shall be served in the manner hereinbefore provided for the service of a notice or by delivering it to any person of suitable age and discretion in charge of the premises affected by such order, or if no person is found in charge by affixing a copy thereof conspicuously upon the premises.