Mailboxer -- Search for "sunday parcel" in the KNOWLEDGEBASE section at the top of the page. You should get the MOU ( signed 24 MAY 2016 ) regarding Sunday/Holiday Parcel Delivery Work List. ( No idea why it could not have been included in the final contract edition - above what used to be my pay grade ).
First, the good news:
In part from the MOU: Rural carrier associates serving vacant regular routes or serving regular routes during the extended absence of the regular carriers, including the first 90 days before becoming a Designation 74-0 will not be schedule for Sunday/Holiday parcel delivery unless all leave replacements from both the volunteer and non-volunteer lists are scheduled. .... In addition, management may bypass leave replacements for Sunday/Holiday parcel delivery if such assigned work hours would result in the leave replacement exceeding 40 hours at the end of the work week.
If your office has hired any ARC's ( LOL ): ARC's will be entitled to Sunday and Holiday parcel delivery prior to RCA's.
Now the bad news:
It's the beginning of the holiday crunch season. Sane rationale for doing things sometimes is disregarded by manglement. Last season there were a few postings that manglement was not at all concerned with overtime for regulars or RCA's, so everybody worked and worked.
Article 3.f of the contract ( Management Rights ) basically gives manglement carte blanche to get the job done. Of course, what manglement may consider as an "emergency" may differ from the carrier's view.
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Make sure you know ALL of the office's phone numbers. Just don't answer the phone on Sunday as a last resort.
Might as well give your Assistant District Representative a heads up on "all subs are "on call" for Sundays, NO excuses."
Sounds as if manglement plans on calling everyone so if you don't get called on a Sunday, first thing Monday morning is to ask for an 8127 to be paid for waiting for the phone call that never came. After all, manglement said you are "on call".
If your body can take it and manglement is willing to throw money around, why not take it?