NIST SP 800-63B is informative, not normative. It codifies existing industry-standard best-practice, but is not in itself law. However, not following best-pract

NIST SP 800-63B is informative, not normative. It codifies existing industry-standard best-practice, but is not in itself law. However, not following best-practices may be argued as negligence if it leads to a breach or decrease in shareholder value.