--- kind: "section" citation: "40 C.F.R. § 1090.1010" title: "40" number: "1090.1010" heading: "Designation requirements for gasoline and regulated blendstocks." url: "https://uscodex.org/cfr/40/1090.1010" --- # §1090.1010. Designation requirements for gasoline and regulated blendstocks. - (a) **Designation requirements for gasoline manufacturers.** A gasoline manufacturer must accurately and clearly designate each batch of gasoline as follows: - (1) A gasoline manufacturer must designate each batch of gasoline as one of the following fuel types: - (i) **Winter RFG.** - (ii) **Summer RFG.** - (iii) **Winter RBOB.** - (iv) **Summer RBOB.** - (v) **Winter CG.** - (vi) **Summer CG.** - (vii) **Winter CBOB.** - (viii) **Summer CBOB.** - (ix) **Exempt gasoline under subpart G of this part (including additional identifying information).** - (x) **California gasoline.** - (2) A gasoline manufacturer must further designate gasoline designated as Summer CG or Summer CBOB as follows: - (i) 7.8 psi Summer CG or Summer CBOB, respectively. - (ii) 9.0 psi Summer CG or Summer CBOB, respectively. - (iii) If the CBOB is excluded from the special regulatory treatment for ethanol under [§ 1090.215(b)(3)(ii)](/cfr/40/1090.215.md?p=b-3-ii), Low-RVP Summer CBOB. - (iv) **SIP-controlled Summer CG or Summer CBOB, respectively.** - (3) A CBOB or RBOB manufacturer must further designate the CBOB or RBOB with the type(s) and amount(s) of oxygenate specified to be blended with the CBOB or RBOB as specified in [§ 1090.710(a)(5)](/cfr/40/1090.710.md?p=a-5). - (4) In addition to any other applicable designation in this [paragraph (a)](#a), gasoline designed for downstream oxygenate blending for which the gasoline manufacturer has not accounted for oxygenate added downstream under [§ 1090.710](/cfr/40/1090.710.md) must be designated as “Intended for Oxygenate Blending”, along with a designation indicating the type(s) and amount(s) of oxygenate to be blended with the gasoline. - (b) **Designation requirements for gasoline distributors and certain gasoline blending manufacturers.** A gasoline distributor, certified butane blender, certified pentane blender, or party that recertifies BOB under [§ 1090.740](/cfr/40/1090.740.md) must accurately and clearly designate each batch or portion of a batch of gasoline for which they transfer custody to another facility as follows: - (1) A distributor must accurately and clearly classify each batch or portion of a batch of gasoline as specified by the gasoline manufacturer in [paragraph (a)](#a) of this section. - (2) Except as specified in [paragraph (b)(2)(vii)](#b-2-vii) of this section, a distributor, certified butane blender, certified pentane blender, or party that recertifies BOB under [§ 1090.740](/cfr/40/1090.740.md) may redesignate a batch or portion of a batch of gasoline without recertifying the batch or portion of a batch as follows: - (i) Winter RFG or Winter RBOB may be redesignated as either Winter CG or Winter CBOB. - (ii) Winter CG or Winter CBOB may be redesignated as either Winter RFG or Winter RBOB. - (iii) Summer RFG, Summer RBOB, Summer CG, or Summer CBOB may be redesignated without recertification to a less stringent RVP designation. For example, a distributor could redesignate without recertification a portion of a batch of Summer RFG to 7.8 psi Summer CG or 9.0 psi Summer CG. - (iv) Summer RFG, Summer RBOB, Summer CG, or Summer CBOB may be redesignated without recertification as either Winter RFG, Winter RBOB, Winter CG, or Winter CBOB. - (v) Summer CG, Summer CBOB, or any winter gasoline may be redesignated to either Summer RFG or Summer RBOB, provided the RVP is determined using the applicable procedures specified in [subpart N](/cfr/40/subpartN.md) of this part and the new batch meets the RFG RVP standard specified in [§ 1090.215(a)(3)](/cfr/40/1090.215.md?p=a-3). - (vi) - (A) California gasoline may be redesignated as RFG or CG, with appropriate season designation and RVP designation under [paragraph (a)](#a) of this section, if the requirements specified in [§ 1090.625(d)](/cfr/40/1090.625.md?p=d) are met. - (B) California gasoline that is not redesignated under [paragraph (b)(2)(vi)(A)](#b-2-vi-A) of this section may instead be recertified as gasoline under [§ 1090.1000(b)](/cfr/40/1090.1000.md?p=b). - (vii) CG or RFG must not be redesignated as BOB. - (3) A distributor, certified butane blender, certified pentane blender, or party that recertifies BOB under [§ 1090.740](/cfr/40/1090.740.md) that redesignates a batch or portion of a batch of gasoline under [paragraph (b)(2)](#b-2) of this section must accurately and clearly designate the batch or portion of the batch of gasoline as specified in [paragraph (a)](#a) of this section. - (c) **Designation requirements for oxygenate producers.** An oxygenate producer must accurately and clearly designate each batch of oxygenate intended for blending with gasoline as one of the following oxygenate types: - (1) **DFE.** - (2) The name of the specific oxygenate (e.g., isobutanol). - (d) **Designation requirements for certified butane and certified pentane.** A certified butane or certified pentane producer must accurately and clearly designate each batch of certified butane or certified pentane as one of the following types: - (1) **Certified butane.** - (2) **Certified pentane.** - (e) **Designation requirements for certified ethanol denaturant.** A certified ethanol denaturant producer must accurately and clearly designate batches of certified ethanol denaturant as “certified ethanol denaturant”. - (f) **Designation requirements for TGP.** A transmix processor must accurately and clearly designate any TGP that they transfer to any other person as “TGP”. ## Notes ### Amendments [85 FR 78469, Dec. 4, 2020, as amended at 89 FR 14775, Feb. 29, 2024; 90 FR 4355, Jan. 15, 2025] ### Authority Authority: 42 U.S.C. 7414, 7521, 7522-7525, 7541, 7542, 7543, 7545, 7547, 7550, and 7601. ### Source Source: 85 FR 78469, Dec. 4, 2020, unless otherwise noted. ### Amendments [85 FR 78469, Dec. 4, 2020, as amended at 89 FR 14775, Feb. 29, 2024; 90 FR 4355, Jan. 15, 2025]