specify correct random effects

#1
Hi all,

I have a CRD with 4 reps and 4 treatments (A, B, C, D). The study took place in 1 location for 3 years. I want to pool over years (so treat year as random effect). I am interested in main effects and up to 2-way interactions.
So I am using the following model and random statement:

MODEL Y=A B C D A*B A*C A*D B*C B*D C*D;
RANDOM rep rep*Year Year*A Year*B Year*C Year*D
Year*A*B Year*A*C Year*A*D Year*B*C Year*B*D Year*C*D;

I was reading if I should include in the random statement the 3- and 4-way interactions of treatments with year.
Since I am not testing the 3- and 4-way treatment interaction (not interested in them), I assume that I don't have to include them in the random statement as year*A*D*C*D

Any help would be greatly appreciated

Thanks