N.Y. Comp. Codes R. & Regs. tit. 20, § 450.1
(a) Where the Tax Commission, in its discretion, deems it necessary to protect the revenue to be obtained pursuant to article 13-A of the Tax Law it may require any person which is a petroleum business as defined in section 300(c) of the Tax Law to file with the Department of Taxation and Finance a bond or other security. Such bond must be issued by a surety company approved by the New York State Superintendent of Insurance as to solvency and responsibility and authorized to transact business in New York State. In lieu of a bond a petroleum business may deposit with the Department of Taxation and Finance other security approved by the Tax Commission. Among the kinds of security which will be accepted are the following:
(6) other forms of security acceptable to the Department of Taxation and Finance.
(b)
(2) Financial institution passbooks and certificates of deposit offered as collateral under this section must represent money on deposit with a financial institution. Certificates of deposit must have maturity dates at least one year subsequent to the date of filing with the Department of Taxation and Finance. Additionally financial institution passbooks and certificates of deposit offered under this section must be:
(iii) accompanied by a letter prepared on the letterhead of the financial institution and signed by an officer of the financial institution:
(3) Standby letters of credit offered as collateral under this section must:
Tax Law, § 302(c)