3 why not 4 or 5......J/k i use 1 chain and binder per axle and 1 strap front and rear.......but lets not start that argument all over again. I was just replying to the guy who stated his bro got a ticket. I was just curious where he got it and what code was stated on the ticket, as the cali. ( i was assuming he got the ticket in cali. might be my mistake)d.o.t. booklet does not make mention of any requirements for 2 attachment points per axle.