(a) Patients shall not be permitted to smoke in bed except under observation.(b) Patients shall be permitted to smoke only in areas so designated. Such areas shall be under periodic observation when patients are smoking.(c) Smoking or open flame is prohibited in all rooms or spaces where oxygen is being administered or stored.(d) No smoking signs shall be prominently posted in any room where oxygen cylinders are in use or stored.Cal. Code Regs. Tit. 22, § 73509