Manufacturers and distributors of "hidden face" bingo cards must:

(1) Meet all requirements for disposable bingo cards; and

(2) Print, fold, and seal each card or sheet of cards so that no one may determine the numbers or configurations of numbers on the card, or the card number until opened; and

(3) Have a separate numbering system for each card or sheet that randomly distributes numbers that is not connected with the card number printed in the "free" space; and

(4) Mix cards or sheets so that:

(a) No relationship exists between the card numbers and separate numbering system within a set or subset; and

(b) No patterns or consistent relationships of location exist between specific card numbers in subsets from different sets; and

(5) Imprint the serial number and the card or sheet number from subsection (3) of this section on the outside of the cards or sheets of cards so that it is visible for recording without opening; and

(6) Make sets of cards that contain at least six thousand unique faces or patterns of numbers. Subsets of "hidden face" bingo cards must contain at least one thousand cards or sheets of cards.