---
kind: "section"
citation: "14 C.F.R. § 399.18"
title: "14"
number: "399.18"
heading: "Maximum duration of fixed-term route authorization granted by exemption; renewal of such authority."
url: "https://uscodex.org/cfr/14/399.18"
---

# §399.18. Maximum duration of fixed-term route authorization granted by exemption; renewal of such authority.


It is the policy of the Department to limit the duration of exemptions which authorize fixed-term route service to a maximum period of two years, and to entertain requests for renewal of such authority only when incorporated in a duly filed application for substantially equivalent certificate authority under [section 401](/cfr/14/401.md) of the Act. (See [§ 377.10(c)](/cfr/14/377.10.md?p=c) of this chapter (Special Regulations).)


## Notes

### Amendments

[PS-21, 29 FR 1446, Jan. 29, 1964, as amended at 65 FR 6457, Feb. 9, 2000]

### Authority

Authority: 49 U.S.C. 41712, 40113(a).

### Source

Source: PS-21, 29 FR 1446, Jan. 29, 1964, unless otherwise noted.

### Amendments

[PS-21, 29 FR 1446, Jan. 29, 1964, as amended at 65 FR 6457, Feb. 9, 2000]