How to choose a dog fence for your yard<br>Check local fencing regulations. Your community may have laws about the materials and sizes allowed for residential fences. Don't rely on a fencing company to know the regulations.
Fencing companies have regulations about the materials and sizes allowed
The context state that communities may have laws/regulations, not that fencing company would. The system likely got confused between the two. 
( z0 have :ARG0 ( z1 company :mod ( z2 fence ) ) :ARG1 ( z3 regulate :ARG1 ( z4 and :ARG1-of ( z5 allow ) :op ( z6 material ) :op ( z7 size ) ) ) )
(z0 / have-03
    :ARG0 (z1 / company
              :mod (z2 / fence))
    :ARG1 (z3 / regulate-01
              :ARG1 (z4 / and
                        :ARG1-of (z5 / allow-01)
                        :op1 (z6 / material)
                        :op2 (z7 / size))))
Fencing companies have regulations about the materials and sizes allowed
z1 :mod z2
z0 :ARG0 z1
z0 :ARG1 z3
z4 :op1 z6
z3 :ARG1 z4
z4 :op2 z7
z4 :ARG1-of z5