Contents of critical memory
Compiled text through Nov 15, 2021
Register checked through Jul 29, 2026
Later Register activity found — review the notice before relying on the compiled text.
Dates and status
- Compiling agency
- Executive Department
- Text status
- Source receipt
- Compiled text through
- Nov 15, 2021
- Register checked through
- July 29, 2026/Vol. XLVIII, Issue 30 (2026-07-29)
- Activity status
- Later Register activity found — review the notice before relying on the compiled text.
- Latest notice
- TAF-46-21-00009-P · Proposed rule · Nov 17, 2021
- Source snapshot
- Jun 6, 2026
Critical memory is used to store all data that is considered vital to the continued operation of the kiosk, including, without limitation:
Following the initiation of a NV-memory-reset procedure (using a certified NV-memory-clear method) the kiosk software shall execute a routine that initializes all bits in critical NV memory to the default state. All memory locations intended to be cleared as per the NV-memory-clear process shall be reset fully in all cases. For kiosks that allow for partial NV-memory clears, the methodology in doing so shall be accurate.
Critical memory storage shall be maintained by a methodology that enables errors to be identified. Such methodology may involve signatures, checksums, partial checksums, multiple copies, timestamps and/or effective use of validity codes. This subdivision is not intended to preclude the use of alternate storage media types, such as hard disk drives, for the retention of critical data. Such alternate storage media shall maintain critical data integrity in a manner consistent with the requirements in this section, as applicable to the specific storage technology implemented.
A kiosk shall not permit the alteration of any meter or error-condition log information without supervised access controls. In the event meter or error-condition log data is changed, an audit log shall be capable of being produced to document: