an examination, certification or report under paragraph 18(3) of Schedule 8 to the Government of Wales Act 2006 (certain examinations into the economy etc with which a person has used resources);

an examination under section 145 of the Government of Wales Act 1998 (examinations into the use of resources) or a study under section 145A of that Act (studies for improving economy etc in services), where undertaken at a person's request;

an examination or study undertaken by the Auditor General at a person's request under section 46(4) of the Environment Act 1995;

an examination under section 15 of the Well-being of Future Generations (Wales) Act 2015 (anaw 2) (examinations of public bodies for the purposes of assessing the extent to which a body has acted in accordance with the sustainable development principle);

any services provided or functions exercised under section 19.

the provision of services to a body under paragraph 20 of Schedule 8 to the Government of Wales Act 2006 (certification of claims, returns etc at the request of a body);

a study at the request of an educational body under section 145B of the Government of Wales Act 1998.

may only be charged in accordance with a scheme prepared by the WAO under section 24;

may not exceed the full cost of exercising the function to which the fee relates;

are payable to the WAO by the person to whom the function being exercised relates.