The specs from the structure in the booklet is described in Annex G of ISO/IEC 18013-1:2018. There are two alternatives; a booklet with a few personalisation or a booklet with no personalisation. The booklet shall be marginally more substantial than an ID-one sizing card, with the insert pocket for storage https://elliottsgpxf.dailyblogzz.com/30322015/a-secret-weapon-for-information-about-passports