32 CFR § 339.3 - Good faith cost estimates.

Even though not legally binding, some agency guidance may result in a substantial economic impact. For example, the issuance of departmental guidance may induce private parties to alter their conduct to conform to recommended standards or practices, thereby incurring costs beyond the costs of complying with existing statutes and regulations. While it may be difficult to predict with precision the economic impact of voluntary guidance, the proposing component of the Department must, to the extent practicable, make a good faith effort to estimate the likely economic cost impact of the guidance document to determine whether the document might be significant. When the component is assessing or explaining whether it believes a guidance document is significant, it will, at a minimum, provide the same level of analysis that would be required for a major determination under the Congressional Review Act (5 U.S.C. chapter 8). When it is determined that a guidance document will be economically significant (see § 339.7(a)(1) of this part), the component must conduct and publish a Regulatory Impact Analysis of the sort that would accompany an economically significant rulemaking (see requirements in E.O. 12866, E.O. 13563, and OMB Circular A-4), to the extent reasonably possible.