The phrase "residency requirement" refers to a rule or regulation that states a person must live in a specific place or area for a certain period of time. Full definition
To make a legal separation official, couples first need to meet residency requirements for their state. (info.legalzoom.com)
For example, if you don't meet residency requirements in the state where you file, the court can not grant your divorce and must dismiss the case. (info.legalzoom.com)
Each state has different divorce residency requirements and which govern exactly where you will file for divorce. (karencovy.com)