4.__Powers.__Unless otherwise stated in this section, each decentralized community sanitary district formed under this section has the same powers and duties as a sanitary district formed under this chapter, except the right of eminent domain, which remains with the municipality or municipalities in which the decentralized community sanitary district is operating.

5.__Connection of new sewers.__Every new building in the territory of a decentralized community sanitary district formed under this section intended for human habitation or occupancy or with facilities for discharge of nonindustrial wastewater must have a sanitary sewer system that is caused by the owner or person against whom taxes on the premises are assessed to be connected with the facilities of the decentralized community sanitary district, upon written application to and approval of the connection by the trustees of the decentralized community sanitary district.__The trustees may require the owner or person proposing a new building or facility to construct at the owner's cost a subsurface wastewater disposal system sufficient for the development according to the subsurface wastewater disposal rules adopted pursuant to Title 22, section 42, subsection 3 for inspection by, dedication to and ownership and management by the decentralized community sanitary district.__If, within 60 days of written application to the decentralized community sanitary district, the decentralized community sanitary district does not direct the owner or person to connect to an existing subsurface wastewater facility or to construct one for ownership and management by the decentralized community sanitary district, the owner or person may construct the necessary wastewater disposal system to serve the new building or buildings, and such system is separate from the ownership by and operations of the decentralized community sanitary district if all applicable state rules and local regulations are met.

6.__Connection of existing sewers.__Buildings within the decentralized community sanitary district existing as of the operative date of the decentralized community sanitary district that are already served by a private sewer or septic system are not required to connect with any sewer of the decentralized community sanitary district.__The decentralized community sanitary district is not obligated to accept into its system the private sewers or septic systems of buildings existing as of the