Enacts the "Housing Stability and Tenant Protection act of 2019"; extends and makes certain provisions of law permanent relating to rent control and rent stabilization (Part A); repeals provisions of law relating to rent increases after vacancy of housing accommodations (Part B); relates to vacancy of certain housing accommodations (Part C); relates to vacancies in certain housing accommodations and repeals various provisions of law relating to vacancy decontrol (Part D); relates to regulation of rents (Part E); relates to investigation of rent overcharge complaints (Part F); establishes the "statewide tenant protection act of 2019"; expands rent and eviction protections statewide (Part G); relates to rent adjustments and prohibition of fuel pass-along charges (Part H); relates to recovery of certain housing accommodations (Part I); relates to not-for-profits use of certain residential dwellings (Part J); relates to the temporary increase in rent in certain cases (Part K); enacts the "rent regulation reporting act of 2019" (Part L); enacts the "statewide housing security and tenant protection act of 2019" (Part M); relates to conversions to cooperative or condominium ownership in New York city (Part N); and relates to the duties and responsibilities of manufactured home park owners and residents (Part O).