So, after reading the Letter from the FAA and the service life limits addressed in the TSO, can we assume that the riggers and parachute manufacturers are essentially imposing a possibly illegal interpretation? If the manufacturer is not able to provide approved documentation that validates a 20 year life limit, as per the FAA's TSO (to which they agreed as part of the certification process), a rigger who refuses to repack an otherwise serviceable parachute could be accused of withholding required maintenance on a certified piece of aviation equipment.

Hmmm.... Release the Lawyers!