To amend the law regarding sewer systems.

HB 4156 prohibits municipalities from requiring property owners to connect to new or expanding sewer systems (mandatory hook-ups) and bans installation fees for these connections. It directly affects homeowners and developers in areas where sewer systems are being expanded. The bill amends existing law to eliminate these specific fees and requires public notice procedures for any future rate changes related to sewer services. This change aims to reduce upfront costs for property owners when connecting to municipal sewer infrastructure.