23 CAR § 355-1318. Bill acceptors

(a) All acceptance devices shall be able to detect the entry of valid bills, coupons, ticket vouchers, or other approved notes, and provide a method, utilizing a bidirectional communication protocol, to enable the EGS software to interpret and act appropriately upon a valid or invalid input. (b) The acceptance device or devices shall be electronically-based and in a highly accurate manner, ensure that only valid bills of legal tender are accepted. (c) The bill input system shall be constructed in a manner that protects against: (1) Vandalism; (2) Abuse; or (3) Fraudulent activity. (d)(1) In addition, bill acceptance device or devices shall only register credits when: (A) The bill or other note has passed the point where it is accepted and stacked; and (B) The bill or other note is irrevocably stacked. (2) If a power failure occurs during acceptance of a bill or other note the bill validator shall give proper credits or return the note, notwithstanding that there may be a small window of time where power may fail and credit may not be given (in this case the window shall be less than one (1) second).