(1) A genuine dispute exists concerning material terms of the writing and justice requires the exclusion.
(2) Admission of the secondary evidence would be unfair.
(b) Nothing in this section makes admissible oral testimony to prove the content of a writing if the testimony is inadmissible under Section 1523 (oral testimony of the content of a writing).
(c) Nothing in this section excuses compliance with Section 1401 (authentication).
(d) This section shall be known as the "Secondary Evidence Rule."
1401. (a) Authentication of a writing is required before it may be received in evidence.
(b) Authentication of a writing is required before secondary evidence of its content may be received in evidence.
1402. The party producing a writing as genuine which has been altered, or appears to have been altered, after its execution, in a part material to the question in dispute, must account for the alteration or appearance thereof. He may show that the alteration was made by another, without his concurrence, or was made with the consent of the parties affected by it, or otherwise properly or innocently made, or that the alteration did not change the meaning or language of the instrument. If he does that, he may give the writing in evidence, but not otherwise.