(a) all statutes, official, notarial and other authentic records, books, registers, instruments, documents or writings, and copies or extracts thereof and therefrom, as well as private writings, are admissible in evidence in any criminal trial, proceedings or inquiry, in the same manner and subject to the same conditions under which they are admissible in evidence under the Code of Civil Procedure, or any other enactment, regulating their proof and admissibility as evidence, on mere production without further proof, or with such further proof, as may be required, and as the case may be;