49 Pa. Code § 13.62
One unmounted finished photograph, not a proof, 2 inches by 2 inches, with clear facial features, of each candidate shall be submitted with the application. This photograph will be numbered with the examination number of the candidate and will be returned to the candidate with a card of admission to the examination. Each candidate shall bring the photograph, so numbered, and the admission card to the examination, and the photograph shall be openly displayed where the candidate takes the examination. If a candidate loses the photograph and admission card, an additional copy of the candidate's photograph shall be forwarded immediately to the Board office. The appropriate number will be affixed and the photograph and a duplicate admission card will be returned to the candidate for use at the examination. A candidate will be furnished with an admission letter for the examination which will contain the candidate's identification number and information pertaining to the date and place of the examination. A candidate shall bring the letter containing the identification number when registering for the examination.
49 Pa. Code § 13.62