The department shall have the authority and power to adopt and promulgate such rules and regulations as may appear necessary and proper to carry out the purposes of this chapter, including, but not limited to, minimum educational and physical requirements for midwives and procedures and techniques to be employed and ethics to be observed in the practice of midwifery. The several county boards of health shall have the authority and power to adopt and promulgate supplementary rules and regulations consistent with those adopted and promulgated by the department.