According to Section 417 of the New York Limited Liability Company Law, the members of a New York LLC are required to adopt a written operating agreement.  The operating agreement may be entered into before, at the time of, or within 90 days after, the filing of the Articles of Organization.  The operating agreement is the primary document that establishes the rights, powers, duties, liabilities and obligations of the members between themselves and with respect to the limited liability company. It is an internal document of the LLC and is not filed with the Department of State. Note, New York law is silent on the consequences of not adopting an operating agreement, but as a general rule, it is best to have an operating agreement when the LLC has more than 1 member.

New York limited liability companies are required to publish a notice of formation.  Section 206 of the New York Limited Liability Company Law requires a notice related to the formation of a limited liability company (LLC) to be published in two newspapers. The newspapers must be designated by the county clerk of the county in which the office of the LLC is located. An affidavit of publication from each newspaper must be filed with the Department of State. A Certificate of Publication, with the affidavits of publication of the newspapers annexed thereto, must be submitted to the Department of State, with the appropriate filing fee.

Of course, it is best to discuss the Special Responsibilities and Formalities Associated With Forming a New York Limited Liability Company with a New York Small Business Lawyer (or company lawyer).