Is a blank page change indicator required on page p1 before the material transcribed from the front or back cover? Or just between the front cover and back cover materials?
No print page indicators are used for the front/back cover materials. A transcriber’s note should be inserted:
“The following material is from the front cover of the book”
Each item in the preliminary pages begins on a new braille page so if you have front cover AND back cover material, they should each start on separate braille pages (and each should have a TN).