Several countries, including Australia and the United States, allow children to enter government buildings. Infants were first allowed onto the Senate floor in Washington after Senator Tammy Duckworth, whose presence was needed to confirm a new NASA administrator, gave birth to a daughter less than two weeks before the vote in 2018.

Stella Creasy, a member of the British Parliament, was chastised in 2021 for bringing her baby to Westminster Hall in London.

Ms. Yong was born in 1990 in Bucheon, a city on the outskirts of Seoul, and became a lawmaker in 2020. In addition to getting rid of no-kids zones, she is also planning to introduce legislation that would allow children and their families to avoid lines at places like museums and amusement parks.

There are almost 3.5 million children under the age of 10 in South Korea, and over 11,000 public facilities designed for children’s play, according to government statistics.