The Shulchan Aruch · Orach Chayim
אורח חיים תכ״אOrach Chayim 421
Siman 421 of 697 in Orach Chayim — 1 se'if
הלכות ראש חודשLaws of Rosh Chodesh· siman 421
Se’if 1א׳
נוֹהֲגִין בְּאַשְׁכְּנָז שֶׁאוֹמְרִים פָּרָשַׁת וּבְרָאשֵׁי חָדְשֵׁיכֶם שַׁחֲרִית אַחַר פָּרָשַׁת הַתָּמִיד. וּבִסְפָרַד אֵין נוֹהֲגִין לְאָמְרָהּ, לְפִי שֶׁעֲתִידִין לִקְרוֹת אוֹתָהּ בַּסֵפֶר תּוֹרָה.
The recitation of "And on your new moons" in Pesukei Dezimra. Contains one section The custom in Ashkenaz is to recite the passage of "And on your new moons" in the morning service after the passage of the daily offering. In Sepharad the custom is not to recite it, since it will be read later from the Torah scroll.
Shulchan Aruch, Orach Chayim — Torat Emet 363 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0