According to Merriam and Webster, a tipping point is the critical point in a situation, process, or system beyond which a significant and often unstoppable effect or change takes place.
Maybe overload point would be a better descriptor.
In Chicago, a sort of tipping point seems to have been reached at the Chicago Police Department where registrants must renew their registration every year. They must also report any changes to this office within three days–changes like an address, a job–losing one or getting one–or enrollment in any school.
They start lining up before 6 a.m. in the well-below freezing weather, in the dark, pre-dawn hours of an Illinois winter. They wait for hours. Some make it in; some don’t. Some are in violation because their three-day window closed during the days they stood there, unable to get in. The line is “cut” at noon, which means anyone still in line will not be processed, no matter how long they have been there. The office says it is open until three. A reporter who has monitored the situation for two weeks has observed the doors being locked before one in spite of the advertised hours of business being 8 a.m. until 3 p.m.