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a: A construction worker doing or proposing to do types of construction that require special MA license and/or a permit where neither exists who also harasses, intimidates and bullies a tenant when on premises doing work that is circumventing proper licensing and requirements to do it.
b: Worker considered 'agent' of (absentee) LL regarding all matters of construction.
c: LL fails to act on tenant's complaints of harassment and instead enables it further
d: Harassment is type which after described in a police report results in an officer telling agent he could be facing criminal charges if he does not stop. (Only then, did the harassment stop.)
Is this sort of thing a "bad condition", "breach of quiet enjoyment" or both?