oped by or for the manufacturer will be provided to the Administrator on April 1 of each year. Such submissions shall be accompanied by a description of the test procedures used in obtaining the information;

(c) The chemical composition of the additive;

(d) The chemical structure of such additive to the extent such information is available;

(e) Assurances that any change in information submitted pursuant to paragraphs (a), (b) (1), (c), and (d) of this § 79.14 will be provided to the Administrator within 30 days of such change. Forms for reporting changes will be provided by the Administrator at the additive manufacturer's request; and

(f) Assurances that the additive manufacturer will not represent directly or indirectly, in any notice, circular, letter or other written communication or any written, oral, or pictorial notice or other announcement in any publication or by radio or television that registration of any additive produced or formulated by him constitutes endorsement, certification, or approval by any agency of the United States.

§ 79.15 Determination of noncompli

in compliance with the regulations of this part with respect to a registered additive, he may, after informing such noncomplying fuel manufacturer or processor of the reasons for such determination, and providing such noncomplying fuel manufacturer or processor a reasonable time in which to comply and/or to present his views concerning such determination, withdraw the registration of such additive for use in any designated fuel of such noncomplying fuel manufacturer or processor.

§ 79.21

Withdrawal of registration: additive manufacturer.

If the Administrator determines that an additive manufacturer is not in compliance with the regulations of this part with respect to a registered additive, or the additive manufacturer requests withdrawal in writing, the Administrator may withdraw the registration of such additive and remove it from the list of registered additives maintained pursuant to § 79.16. The Administrator shall notify affected fuel manufacturers of such withdrawal by publication in the FEDERAL REGISTER, and may allow a period of 120 days during which a fuel manufacturer or processor may use any such additive he has on hand on the date of such withdrawal. Prior to withdrawing registration the Administrator shall:

(a) Inform such noncomplying additive manufacturer of the reasons for such determination; and

(b) Provide such noncomplying additive manufacturer a reasonable time in which to comply and/or to present his views concerning such determination.

Subpart D-Designation of Fuels § 79.30 Scope.

Fuels designated and dates prescribed by the Administrator for the registration of fuel additives are listed in this subpart. Additional fuels may be designated and additional dates prescribes as the Administrator deems advisable.

§ 79.31 Motor gasolines.

All fuels commonly or commercially known or sold as motor gasoline, with the exception of aviation gasoline, are hereby designated. All additives contained in such fuels must be registered (210 days

following final publication of this notice). For the purpose of § 79.2(f) exemptions are made for:

(c) A substance which contains only one or more of the following elements: Carbon, hydrogen, and/or oxygen.

Metropolitan Dayton Intrastate Air Quality Control Region.

Louisville Interstate Air Quality Control Region.

Phoenix-Tucson Intrastate Air Quality Control Region.

Metropolitan Detroit-Port Huron Intrastate Air Quality Control Region. Metropolitan Houston-Galveston Intrastate Air Quality Control Region.

Metropolitan Dallas-Fort Worth Intrastate Air Quality Control Region.

Metropolitan San Antonio Intrastate Air Quality Control Region. Metropolitan Birmingham Intrastate Air Quality Control Region.

Chattanooga Interstate Air Quality Control Region.

Metropolitan Toledo Interstate Air Quality Control Region.

Metropolitan Memphis Interstate Air Quality Control Region.

Metropolitan Atlanta Intrastate Air Quality Control Region.

U.S. Virgin Islands Air Quality Control Region.

Metropolitan Oklahoma City Intrastate Air Quality Control Region. Champlain Valley Interstate Air Quality Control Region.

81.18

Metropolitan St. Louis Interstate Air

Quality Control Region (MissouriIllinois).

Southeast Florida Intrastate Air Quality Control Region.

81.19

Metropolitan Boston Intrastate Air Quality Region.

81.20

Metropolitan Cincinnati Interstate

Metropolitan Omaha-Council Bluff's Interstate Air Quality Control Region.

Portland Interstate Air Quality Control Region.

Wasatch Front Intrastate Air Quality Control Region.

81.23

81.24

Southwest Pennsylvania Intrastate Air Quality Control Region. Niagara Frontier Intrastate Air Quality Control Region.

Southern Louisiana-Southeast Texas Interstate Air Quality Control Region.

Cook Inlet Intrastate Air Quality Control Region.

81.25

Metropolitan Kansas City Intrastate

66-088-72-12

81.179

Control Region.

81.181

Down East Intrastate Air Quality Control Region.

81.182 Northwest Maine Intrastate Air Quality Control Region.

81.183

Eastern Connecticut Intrastate Air
Quality Control Region.

81.184 Northwestern Connecticut Intrastate
Air Quality Control Region.
81.185 Northern Washington Intrastate Air
Quality Control Region.

81.187 Olympic-Northwest Washington Intrastate Air Quality Control Region.