40 CFR § 97.707 - Computation of time.

---
identifier: "/us/cfr/t40/s97.707"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 97.707 - Computation of time."
title_number: 40
title_name: "Protection of Environment"
section_number: "97.707"
section_name: "Computation of time."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "97"
part_name: "FEDERAL NOX BUDGET TRADING PROGRAM, CAIR NOX AND SO2 TRADING PROGRAMS, CSAPR NOX AND SO2 TRADING PROGRAMS, AND TEXAS SO2 TRADING PROGRAM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401, 7403, 7410, 7426, 7491, 7601, and 7651,"
regulatory_source: "65 FR 2727, Jan. 18, 2000, unless otherwise noted. 71 FR 25396, 25422, and 25443, Apr. 28, 2006"
cfr_part: "97"
---


# 97.707 Computation of time.

(a) Unless otherwise stated, any time period scheduled, under the CSAPR SO<sub>2</sub> Group 2 Trading Program, to begin on the occurrence of an act or event shall begin on the day the act or event occurs.

(b) Unless otherwise stated, any time period scheduled, under the CSAPR SO<sub>2</sub> Group 2 Trading Program, to begin before the occurrence of an act or event shall be computed so that the period ends the day before the act or event occurs.

(c) Unless otherwise stated, if the final day of any time period, under the CSAPR SO<sub>2</sub> Group 2 Trading Program, is not a business day, the time period shall be extended to the next business day.