Hi ,
I usually fit rugs from the front to the back , and take them off the opposite way.
For the exams you can do either - but you must be able to say why you fit and remove the rugs the way you do.
I prefer to fit from the front so that you are sure the rug is far enough forward before you do up the straps and it is easier to get a good fit. If you fit starting from the middle and the rug is too far back , you have to undo the straps again to reposition the rug before fastening the front straps. Whichever method you use , always ensure you do it safely - e.g. do not leave a horse ( to answer the telephone or something ) with straps left undone and dangling.
Hope this makes sense !!
Jonathan,
http://www.equestre.co.uk/