43 CFR § 3266.11
When I submit confidential, proprietary information, how can I help ensure that it is not available to the public?
June 11, 2020
When you submit data and information that you believe to be exempt from disclosure by part 2 of this title, you must clearly mark each page that you believe contains confidential information. BLM will keep all data and information confidential to the extent allowed by §2.13(c) of this title.