(b) Any equivalent of registered or certified mail designated by the United States secretary of the treasury, or as may be designated by the state board of elections pursuant to the same criteria used by such secretary for such designations pursuant to section seventy-five hundred two of the internal revenue code, shall be included within the meaning of registered or certified mail as used in this chapter. If the state board of elections finds that any equivalent of registered or certified mail designated by such secretary or the state board of elections is inadequate for the needs of the state, the state board of elections may withdraw such designation for purposes of this article.