By Ibn Juzay al-Mālikī | Translated by Suhaib Webb
It is permissible to move from one Madhāb to another if three conditions are met:
- One is certain of the knowledge and virtue of the one whose opinion he follows
- One does not follow the dispensations [Ar. Rukhaṣ] of a school
- One does not combine [the opinions] of the schools in a way that contradicts the binding consensus [Ar. Ijmā̓] like marrying without a bridal gift, a guardian or witnesses, as this is a scenario which no [person of knowledge] sanctioned.
Taqrīb al-Wusūl ila ‘Ilm al-Usūl pg. 448-450