respec / autotrainFollow

I hear you can do a single line respec at level 40. I also hear that you can autotrain a skill line and it will autotrain to 1/4 of your level. I am a level 35 friar about to cap caledonia and am going to make a mad dash to 40. When I get there can I do a single line respect of my parry ability and then have it autotrain to 1/4 of my level(10 i guess) or does it have to be from beginning to autotrain?