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U.S. Department of Education: Promoting Educational Excellence for all Americans
Regulations: Part 300 / A / 300.34 / c / 7 / ii / A

(A) Spatial and environmental concepts and use of information received by the senses (such as sound, temperature and vibrations) to establish, maintain, or regain orientation and line of travel (e.g., using sound at a traffic light to cross the street);