This document corrects an emergency final rule published in the Federal Register on May 2, 1985, under Docket No. HM-149D (50 FR 18667). The emergency final rule published under HM-149D renewed for two years the exceptions (statutory exemptions) for specified quantities of radioactive materials found in 49 CFR 173.4, 173.421- I and 173.421-2. The effective dates of the exceptions found in these sections were extended until May 2, 1987. The emergency final rule also revised the language contained in §§ 173.448(f) and 175.700(c). This action is necessary to correct an inadvertent editorial change that was made to § 173.448(f) of that document because the change as published would have prohibited the transportation by passenger-carrying aircraft of radioactive materials which the rule change was intended to authorize.