When required by law or regulation, an appraiser must do what concerning USPAP?

In the context of appraisal practice, especially when dealing with legal and regulatory frameworks, compliance with the Uniform Standards of Professional Appraisal Practice (USPAP) is essential whenever it is mandated by law or regulation. USPAP establishes the standards for professionalism in appraisal practice and is designed to ensure integrity, consistency, and credibility in the appraiser's work.

When it is stated that an appraiser "must comply," it emphasizes the obligatory nature of adherence to these standards when required. This compliance is not merely a suggestion or an option but a requirement for maintaining professional accountability and upholding the legal framework governing appraisal practices.

The other choices suggest varying degrees of obligation that do not reflect the mandatory nature of compliance when legal or regulatory requirements are in place. "May choose to comply" indicates personal discretion, which undermines the compulsive necessity when laws dictate adherence. Similarly, "should strive to comply" introduces a weaker standard of effort rather than strict compliance, and "might consider compliance" implies an optional approach, which is not suitable in a legal context where adherence is expected. Therefore, the option emphasizing compulsory compliance aligns with the principles of professionalism and integrity governing the appraisal profession.