Each medical facility (including each nursing home facility for which the Secretary contracts under
section 1720 of this title and each State home facility constructed or altered under subchapter III of this chapter) shall be of fire, earthquake, and other natural disaster resistant construction in accordance with standards which the Secretary shall prescribe on a State or regional basis after surveying appropriate State and local laws, ordinances, and building codes and climatic and seismic conditions pertinent to each such facility. When an existing structure is acquired for use as a medical facility, it shall be altered to comply with such standards.