54. Psychologists may, by written agreement with the client,(1) require an advance to cover the payment of expenses necessary to perform the professional services required;
(2) require partial payment if they act as consultants to a client in connection with a long-term contract;
(3) require administrative fees for an appointment missed by the client according to predetermined and agreed-upon conditions, those fees not to exceed the amount of the lost fees; and
(4) subject to the applicable legislative provisions, charge fees supplementary to those reimbursed by a third party.