| 
			12.21 A Control Zone normally is controlled 
			airspace extending upwards from 
						2,200 feet above the surface of the earth.                                                                                                       
						700 feet above the surface of the earth.                                                                                                       
						the surface of the earth to 3,000 feet.                                                                                                       
						a specified height above the surface of the earth. 
						 |