‘ 5. Operation and maintenance and asset management; rules. The department may adopt rules establishing standards for operation and maintenance and asset management for publicly owned treatment works and municipal satellite collection systems. For the purposes of this subsection, "municipal satellite collection system" has the same meaning as in section 414-D, subsection 1, paragraph A. Rules adopted pursuant to this subsection are major substantive rules as defined in Title 5, chapter 375, subchapter 2-A.’