Originally Posted by 4A2B

no need to ask the FAA, it is in our CBA:

The provisions of Section 26.J.2. are predicated upon the
premise that time spent on a pilot scheduled Company
jumpseat is not accrued duty time under this contract or the
FARs. Should the Company be required to consider time spent
on a pilot scheduled Company jumpseat as accrued duty time,
Section 26.J.2., shall become null and void immediately.