PART XXI WELDING, BURNING AND CUTTING OPERATIONS — Radiation protection
452
(1) Arc welding shall not be carried out unless a worker who may be exposed to radiation from the arc flash is protected by an adequate screen, curtain or partition or wears suitable eye protection.
452(2)
A screen, curtain or partition near an arc welding operation shall be made of or treated with a flame-resistant material or coating, and have a nonreflective surface finish.
Not legal advice. Verify the cited article against the signed agreement.