Add to ORKGSubmitted to electors by referendum. Regulates the construction, alteration, maintenance, use and occupancy of tenement houses and hotels throughout California and of dwellings in incorporated municipalities; repeals “State Tenement House Act,” “State Hotel and Lodging House Act,” and “State Dwelling House Act,” combining provisions thereof in this act with changes and additions, defines fireproof, semi fireproof and wooden buildings; requires roofs of all semi fireproof buildings and of wooden buildings in incorporating municipalities to be constructed of approved incombustible materials or be well covered with an approved composition, fire resistive or fire retardant material