Definitions
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) Seasonal employment means annually recurring periods of work of less than 12 months each year. Seasonal employees are permanent employees who are placed in nonduty/nonpay status and recalled to duty in accordance with preestablished conditions of employment.
(b) Intermittent employment means employment without a regularly scheduled tour of duty.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.