2. The duties include, but are not limited to, the following:
- a. Register and maintain certifications of birth as provided in sections 144.13 through 144.18, 144.45, and 144.46.
- b. Register and maintain certifications of death as provided in sections 144.26 through 144.35, 144.45, and 144.46.
- c. Issue and maintain marriage certificates as provided in sections 144.36, 144.45, and 144.46, and chapter 595.