Home expansion requires septic tank conversion?

[kalakoa]

11-62-06(m) The director, at the director's discretion, may require that a wastewater system be upgraded to meet the applicable requirements of this chapter whenever a building modification is proposed that may change the nature or quantity of wastewater flowing to the wastewater system. The modification may include but not be limited to adding additional bedrooms to a dwelling

Act surprised: the relevant rules and laws ("for everyone") leave it up to "the director's discretion".