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3: Measures to achieve NLR of 35dB must be included in the design and construction of structures <br />where occupants reside; the public is received; office areas are located; or noise sensitive <br />activities or functions occur. <br />4: Sound reinforcement or amplification systems must be installed. <br />5: Residential structures are not permitted. <br />6: Occupied structures are not permitted. <br />7: Individual hearing protection devices must be worn where structural or other forms of physical <br />noise attenuation are not available. <br />56 <br />