29 C.F.R. § 785.30 Independent training.
Title 29 - Labor
Of course, if an employee on his own initiative attends an independent school, college or independent trade school after hours, the time is not hours worked for his employer even if the courses are related to his job.
Title 29: Labor
PART 785—HOURS WORKED
Subpart C—Application of Principles
Lectures, Meetings and Training Programs
§ 785.30 Independent training.