Lead law in MA, legal definition of "lives"

[Brendan L.]

What's the liability landscape look like when, for example, grandparents have their grandchildren under 6 visit and sleep over in a non-deleaded apartment? Or what about cases where a tenant doesn't tell the landlord they have children under 6 staying for extended periods, or even living there? The laws seem to require you to delead if children under 6 live there, but is there a legal definition of what "live" means?