§ 202-a. Sale of a security. A description of a security, as such term is defined in section two hundred two, substantially similar to the description specified in said section shall, in the absence of agreement to the contrary and unless otherwise provided by statute, be deemed sufficient for the purposes of a notice of sale of such security at public auction to satisfy a lien thereon although such sale is not made pursuant to the provisions of this article. Nothing in this section or in section two hundred two or in section two hundred two-b shall be construed to invalidate any sale of such a security made in accordance with the provisions of an applicable agreement.