Local government and policy makers should partner with local organizations or nonprofits to support employers by providing resources to for lactation accommodations and/or create awards recognition for employers--this will educate, encourage and promote employers to establish and build best practices. See below example.
The Healthy Mothers Workplace Coalition, through support from the City and County of San Francisco, provides valuable resources to employers on lactation resources, policy and Employer Awards for the employers with innovative and generous policies from lactation accommodations to parental leave policy. This has allowed employers to come together to learn from each other, as well as understand resources to setup a successful and effective program for employees.
Criteria for Lactation Accomodation Employer Award: https://legalaidatwork.org/wp-content/uploads/2019/08/2018-Healthy-Mothers-Workplace-Self-Assessment-Worksheet-00551005.pdf