Under 14 CFR § 107.65, how often must a remote pilot in command renew aeronautical knowledge recency to keep exercising remote PIC privileges?

Why: 14 CFR § 107.65 requires a remote pilot to have accomplished one of its listed recency actions within the previous 24 calendar months in order to exercise remote PIC privileges.

• This borrows the part 61 12-calendar-month flight review interval; part 107 recency instead runs on a 24-calendar-month cycle under § 107.65.
• The 2021-04-06 discontinuation of the separate UGR recurrent knowledge test (`uas_testing_information.pdf` p. 1) replaced that exam with recurrent training as an option — it did not eliminate the ongoing 24-month recency requirement in § 107.65.