(a) The commission or executive director may compel a retail public utility that has obtained a certificate of public convenience and necessity to provide water or sewer service, or both, that complies with all statutory and regulatory requirements of the commission if necessary to ensure safe drinking water or environmental protection.(b) The commission or executive director may compel a retail public utility to provide an emergency interconnection with a neighboring retail public utility for the provision of temporary water or sewer service, or both, for not more than 90 days if necessary to ensure safe drinking water or environmental protection.(c) Notice of an action under this section is adequate if the notice is mailed or hand-delivered to the last known address of the retail public utility's headquarters.