40 CFR § 97.355
Banking
June 9, 2020
(a) CAIR NOX Ozone Season allowances may be banked for future use or transfer in a compliance account or a general account in accordance with paragraph (b) of this section.
(b) Any CAIR NOX Ozone Season allowance that is held in a compliance account or a general account will remain in such account unless and until the CAIR NOX Ozone Season allowance is deducted or transferred under §97.342, §97.354, §97.356, or subpart GGGG or IIII of this part.