A municipality may not enact an ordinance that prohibits or restricts a woman breast-feeding a child in a public or private location where the woman and child are otherwise authorized to be. In a municipal ordinance, “lewd conduct,” “lewd touching,” “immoral conduct,” “indecent conduct,” and similar terms do not include the act of a woman breast-feeding a child in a public or private location where the woman and child are otherwise authorized to be. Nothing in this section may be construed to authorize an act that is an offense under a municipal ordinance that establishes an offense with elements substantially equivalent to the elements of an offense under AS 11.61.123. This section is applicable to home rule and general law municipalities.