Siman 530
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 חֹל הַמּוֹעֵד אָסוּר בִּקְצָת מְלָאכוֹת, וּמֻתָּר בְּמִקְצָתָן. הַגָּה: לְפִי צֹרֶךְ הָעִנְיָן שֶׁהָיָה נִרְאֶה לַחֲכָמִים לְהַתִּיר.
1 On Chol Hamoed, some labors are prohibited and some are permitted. Rema: According to the need, the Sages saw fit to permit.