On April 12, 1994, RSPA published a final rule requiring that new and replaced pipeline facilities be .constructed to accommodate inspection by instrumented internal inspection devices commonly known as "smart pigs." RSPA has received'two petitions for reconsideration of that rule as it applies to gas pipelines. In response to those petitions, this notice proposes to modify the rule with respect to: Replacements in gas transmission lines located in less populated areas; and replacements in gas transmission lines located offshore. In addition, in order to allow completion of rulemaking on these proposals, this notice proposes limited extension of the compliance dates for certain current requirements. Finally, this document announces RSPA's decision with respect to other matters raised in the petitions.