Orange -- "Are all RCA’s required to work Amazon Sunday’s?"
-- Depends...history lesson...
-- Step 4 ( R-54 ) provided for the establishment of a list for substitutes, RCA's, and rural carrier relief employees who desired Sunday work -- back in 1996.
-- USPS letter dated October 8, 2003 with the subject line of Sunday Package Delivery Work List - Rural Carriers. PTF, RCA's, substitutes, and RCR's at Hub locations were afforded the opportunity to sign the Sunday Package Delivery Work List. There was no obligation to offer Sunday work on a rotating basis for those on the list. Also, those on the list could be bypassed if there was a possibility of going into OT at week's end.
-- NOV 2013 -- It was announced that the "Postal Service to Make Sunday Deliveries for Amazon".
-- MOU ( S-106 5/24/2016 ) established the Sunday/Holiday Parcel Delivery Work List. A NRLCA rep and a postal rep were to create a listing of all available RCA's, RCR's, substitutes, and PTF's assigned to a hub location. Those on the list had to indicate if they wanted the Sunday / Holiday work or not. Then the lists were alphabetized by last name - regardless of seniority, etc. One list was for those wanting the work. A second list was for those who did not want the work. But those on the second list might be called in if insufficient number available from the "desired" list.
RCA's serving on vacant routes or covering for an absence of a regular carrier would not be scheduled for Sunday/holiday work. Nor would those with approved leave or an approved non-scheduled day next to a Sunday or holiday -- unless the RCA noted in writing the desire to work. Those on the list could be bypassed if there was a possibility of going into OT at week's end.
ARC's at the hub location would be utilized before those on the list.
-- And as "Rt2mailman" posted -- religious reasons could be the reason an RCA doesn't do Sunday Amazon.