What does every page on the E passport have, excluding pages 14 and 15?

Every page of the e-passport, aside from pages 14 and 15, features a watermark. This design element is crucial for enhancing security and helps in preventing counterfeiting. Watermarks serve as a visual cue that can be observed when the pages are held up to the light, providing an additional layer of verification for border protection officials and enhancing the overall authenticity of the document. This feature is specifically designed to ensure that the passport meets international standards and maintain the integrity of its issuance.

Other elements, such as a holographic image, unique serial numbers, and personal photos, are generally present in passports but are not consistent on every page, especially in the context of the e-passport format as specified in the question.