Each real estate appraiser licensed under this chapter must comply with generally accepted standards of professional appraisal practice and generally accepted ethical rules to be observed by a real estate appraiser. Generally accepted standards of professional appraisal practice are currently evidenced by the uniform standards of professional appraisal practice as directed by the Appraisal Subcommittee of the Federal Financial Institutions Examinations Council or its agent; however, after a public hearing held in accordance with the laws of this state applicable to public hearings, the board may make such modifications in excess of those standards as the board deems appropriate for this state.