On April 30, 1970, the Office of Pipeline Safety issued a notice of proposed rule making, notice 70-8, containing requirements for corrosion control (35 F.R. 7127). The purpose of this notice is to make certain changes in that proposal, relating to cast iron and ductile iron pipe. Proposed § 192.471 would require cathodic protection of existing coated and bare cast iron and ductile pipe. Upon further review, it has been determined that, with respect to cast iron or ductile iron pipe that has been installed in the ground for any extensive period of time, cathodic protection is of little if any benefit and therefore that this proposal is impractical. Therefore, to avoid unnecessary work by commenters, notice 70-8 is amended to delete proposed § 192.471.