All -- Sorry, I don't have access to the latest membership numbers regarding regular carriers, PTFs, ARCs, and RCAs
Regarding the last 2 lines of the statement -- It appears to be a numbers game.
-- The NRLCA ( mis- ) represents 130,000 career and non-career rural carriers.
-- Those 130,000 carriers serve 80,000 routes.
-- That supposedly leaves 50,000 carriers available ( or nearly so ) to cover the 80,000 routes when the regular carriers needs to be off for leave, appointments, or whatever.
-- Somewhat doubtful that all the 80,000 routes would have all the carriers covering those 80,000 route be off at the same time. So why is there a shortage of RCAs and PTFs that requires a MOU to have regular carriers "volunteer" to work on other routes as well as on Sundays?