# 43 CFR § 45.3: How are time periods computed?

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-43-45.3

## Section

- **Citation:** 43 CFR § 45.3
- **Heading:** How are time periods computed?
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 43—Public Lands: Interior > Subtitle A—Office of the Secretary of the Interior > PART 45—CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES > Subpart A—General Provisions

## Text

(a) General. Time periods are computed as follows:
(1) The day of the act or event from which the period begins to run is not included.
(2) The last day of the period is included.
(i) If that day is a Saturday, Sunday, or Federal holiday, the period is extended to the next business day.
(ii) The last day of the period ends at 5 p.m. at the place where the filing or other action is due.
(3) If the period is less than 7 days, any Saturday, Sunday, or Federal holiday that falls within the period is not included.
(b) Extensions of time. (1) No extension of time can be granted to file a request for a hearing under § 45.21, a notice of intervention and response under § 45.22, an answer under § 45.25, or any document under subpart C of this part.
(2) An extension of time to file any other document under subpart B of this part may be granted only upon a showing of good cause.
(i) To request an extension of time, a party must file a motion under § 45.35 stating how much additional time is needed and the reasons for the request.
(ii) The party must file the motion before the applicable time period expires, unless the party demonstrates extraordinary circumstances that justify a delay in filing.
(iii) The ALJ may grant the extension only if:
(A) It would not unduly prejudice other parties; and
(B) It would not delay the decision under § 45.60.

## Nearby sections

- [43 CFR § 45.1 § 45.1 What is the purpose of this part, and to what license proceedings does it apply?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.1.md)
- [43 CFR § 45.2 § 45.2 What terms are used in this part?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.2.md)
- [43 CFR § 45.3 § 45.3 How are time periods computed?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.3.md)
- [43 CFR § 45.4 § 45.4 What deadlines apply to the trial-type hearing and alternatives processes?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.4.md)
- [43 CFR § 45.70 § 45.70 How must documents be filed and served under this subpart?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.70.md)
- [43 CFR § 45.71 § 45.71 How do I propose an alternative?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.71.md)
- [43 CFR § 45.72 § 45.72 May I file a revised proposed alternative?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.72.md)
- [43 CFR § 45.73 § 45.73 When will DOI file its modified condition or prescription?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.73.md)
- [43 CFR § 45.74 § 45.74 How will DOI analyze a proposed alternative and formulate its modified condition or prescription?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.74.md)
- [43 CFR § 45.75 § 45.75 Has OMB approved the information collection provisions of this subpart?](https://www.frixlaw.com/law-library/statutes/ecfr-43-45.75.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-43-45.3. Check the current official text before relying on it. Not legal advice.