Your question is not 100% clear to me. (Could be me, its been a long day!)

Quote
They argue that the code doesn't cover this due to low voltage


I believe this is wrong!

Rules 30-1202 to 30-1208 apply to extra-low-voltage lighting systems. It seems you have a codebook so check it out.

BTW, check out the "Scope" in section "0".

If your province has adopted the CEC then low voltage is covered by the code.