Maintenance and Modifications
FAA AC Guides on Continuous Airworthiness Mx Programs
Camp is required for Part 121 and certain Part 135 operators, but is optional for other Part 135 and 91K operators.

The FAA has issued a draft advisory circular (AC 120-MPTP) containing guidelines, recommendations and suggested means of compliance with a continuous airworthiness maintenance program (Camp). Under Camp, maintenance training, supervision, and activities must be tailored to the user’s specific operation. Information in this draft AC includes “regulatory expectations” regarding the implementation of the program.