The color codes 17A and 19A disposed on {TAIL ~ the rail} 16 of each rail assembly 42, 46 comprise {HEAD ~ a colored tape} 
The color codes 17A and 19A disposed on { TAIL ~ the rail } 16 of each rail assembly 42 , 46 comprise { HEAD ~ a colored tape }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD