As noted in the below excerpt from the Kentucky Home Inspector licensing laws, licensed home inspectors are required to follow a Standards of Practice.
KRS 198B.706 Duties and powers of board. (Kentucky Board of Home Inspectors)
The board shall:
(13) Require all fee-paid home inspections to be conducted in accordance with the standards of practice of:
(a) The American Society of Home Inspectors;
(b) The National Association of Home Inspectors; or
(c) Any other approved standards of practice that are equal to the standards of practice of the organizations in paragraphs (a) and (b) of this subsection.