Shabbat-Rosh Chodesh: Adding Ul'Chaparat Pasha

SITUATION It is Rosh Chodesh in a Jewish leap year.
WHAT TO DO
Add “ul'chaparat pasha” to musaf—from Rosh Chodesh Cheshvan through and including the second month of Adar. 
REASON This blessing usually contains 12 requests--corresponding to the 12 months--and so in a leap year, we add ul'chaparat pasha for the 13th month.
NOTE Don't say ul'chaparat pasha on Rosh Chodesh Nisan or after that until the next Jewish leap year.
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