A new law aims to ensure breastfeeding mothers have a lactation room - that isn't a bathroom - in certain public buildings.

President Trump signed the new measure, called the "Fairness for Breastfeeding Mothers Act of 2019," into law on Friday. The bill requires public buildings that have a public bathroom to provide a space for mothers to breastfeed their babies.

The 'lactation' room must be separate from the restroom, hygienic, and available for public use. It must also be shielded from public view, free of intrusion, and must have a chair, working surface and electrical outlet.

Buildings can be excused from this if it would be too expensive or unreasonable to create such a space.