Chemical test NBR 15733 Clause 3 Cover verification NBR 15733 Clause 4.1 Verification of formats NBR 15733 Clause 4.2 Brain verification NBR 15733 Clause 4.3 Paper verification NBR 15733 Clause 4.4 Verification of the number of leaves NBR 15733 Clause 4.5 Checking holes NBR 15733 Clause 4.6 Post print verification (security requirements) NBR 15733 Clause 4.8 Packaging verification NBR 15733 Clause 5