Where there is no local enforcement agency charged with the enforcement of this part pursuant to Section 17964, and to the extent that enforcement responsibility is not assigned to a local enforcement agency pursuant to Section 17960, 17961, or 17961.5, the department shall enforce all the applicable provisions of this part, the building standards published in the State Building Standards Code, and other rules and regulations promulgated by the department pursuant to the provisions of this part, or alternative standards adopted by a city or county pursuant to this part, pertaining to apartment houses, hotels, or dwellings.