The board of county commissioners shall have authority to contract for the services of consulting engineers to prepare the necessary surveys, plans, plats, profiles, estimates, and all other details for said work or improvements and to supervise said work. The consulting engineer may be a person, firm, or corporation, resident in or outside of the State of Oklahoma, duly registered as an engineer in the State of Oklahoma. The board of county commissioners shall have authority to contract for the services of bond attorneys or fiscal agents to prepare and sell the bonds of the assessment district as provided for by law. These services shall include the preparation of documents and transcripts, printing, advertising, appraising, delivering, and such other expenses as may be necessary to issue and to sell bonds of the assessment district.

The compensation for the engineering services shall not exceed the guidelines established by the Oklahoma Society of Professional Engineers. The compensation for the bond attorneys and fiscal agents shall be consistent with statutes prescribing fees for similar services for general obligation bonds issued by cities and counties. The county shall provide for the payment of such services and expenses from the assessments to be levied against the property as part of the cost of the improvements or from available county road funds.