These rules are applicable to the process by which a county Board of Elections in New York State, in accordance with the provisions of section 5-506 of the Election Law, discontinues preparation, use and maintenance of registration poll records and prepares, uses and maintains instead a computer registration file (hereinafter sometimes referred to as “the file”) which includes, inter alia, a computer-stored image of the signature of each voter and from which the registration poll list for use at each polling place on election day shall be produced.