28. A veterinary surgeon shall charge and accept fair and reasonable fees, justified by the circumstances and in proportion to the services provided. A veterinary surgeon shall take particular account of the following factors when determining fees:(1) the time required to provide the professional services;
(2) the difficulty and importance of the professional services to be provided;
(3) the need to perform unusual services or services requiring exceptional competence or speed;
(4) the veterinary surgeon’s experience and expertise; and
(5) the importance of the responsibility assumed.