41 CFR § 101-39.206
Seasonal or unusual requirements
June 9, 2020
Agencies or activities having seasonal, peak, or unusual requirements for vehicles or related services shall inform the GSA IFMS fleet management center as far in advance as possible. Normally, notice shall be given not less than 3 months in advance of the need. Requests for vehicles for other than indefinite assignment will usually be filled for agencies participating fully with the GSA IFMS, provided resources permit. Other than fully participating agencies will normally not be accommodated for seasonal, peak, or unusual vehicle requirements.
[56 FR 59889, Nov. 26, 1991]