General Order 95
12.3 Lines Constructed Prior to This Order
The requirements of this Order, other than the safety factor requirements specified in Rule 12.2 , do not apply to lines or portions of lines constructed or reconstructed prior to the effective date of this Order. In all other particulars, such lines or portions of lines shall conform to the requirements of the rules in effect at the time of their construction or reconstruction.
Lines or portions of lines constructed or reconstructed before July 1, 1942, may conform to and be maintained in accordance with the requirements of this Order, instead of the requirements in effect at the time of such construction or reconstruction.