(1) Sections 12752 to 12758 shall not limit the right of the owner of a structure in which sanitary sewage originates voluntarily to connect the structure to a public sanitary sewer system where the operator of the system agrees to the connection.

    (2) Sections 12752 to 12758 are in addition to and not in limitation of the power of a governmental unit to adopt, amend, and enforce ordinances relating to the connection of a structure in which sanitary sewage originates to its public sanitary sewer system.