Specifications include, but are not limited to: A. Stamps shall measure not less than 3/8" by 3/8" or more than 5/8" by 5/8" outside dimension. B. Stamps shall be designed so that the state of issuance and denomination can quickly be determined upon unaided visual inspection of stamps affixed to packages of cigarettes. An icon symbol designating state and denomination must be used in conjunction with any type of machine-readable code, including a bar code. C. Stamps shall contain hidden security features that will allow qualified staff of both the Department and the Contractor to determine their authenticity. It is permissible if some, but not all, of these features require analysis by the contractor in its lab or other testing facility. D. Heat-applied stamps shall be constructed in layers consisting of at least five impressions, including safety-tint lettering, applied to a release type carrier using a gravure process. 1. Each stamp shall contain not less than three different distinctive colors. Half tones, Ben-Day effects, shades, tints, or tones of a color or colors will not be acceptable or considered as separate and distinctive colors. The safety-tint lettering will not be considered as one of the colors. E. All stamps on rolls shall be numbered to provide a means to trace both affixed and unaffixed stamps in the case of fraud, theft, or loss. The stamps on one roll shall all bear the same number. The number may not be repeated sooner than every three years. The numeric or alphanumeric system should provide for at least 576,000 unique combinations (24 x 24 x 10 x 10 x 10). All stamps on sheets shall be numbered with the date of the press run. All sheets shall be consecutively numbered and there shall be no duplicate sheet numbers.