Siman 18
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א קִדּוּשִׁין תּוֹפְסִין בְּחַיָּבֵי לָאוִין וּבְחַיָּבֵי עֲשֵׂה, וְכָל שֶׁכֵּן בִּשְׁנִיּוֹת דְּרַבָּנָן (טוּר)
1 Betrothal takes hold between those who are prohibited by a negative commandment or positive commandment, and all the more so, [between those] with secondary Rabbinic prohibitions (Tur).