According to the Cinematograph Act, 1952, and the rules governed by the Central Board of Film Certification (CBFC), all films intended for public exhibition in India, including imported foreign films, must obtain a certificate from the CBFC (statement 1 is incorrect). A film dubbed from one language into another is treated as a new film for censorship purposes and requires fresh certification (statement 2 is correct). The 'S' category certificate is issued for films intended for specialized audiences, such as doctors, scientists, or other professionals, and restricts public exhibition (statement 3 is correct).