§1. Until a person makes profession in the new institute, the rights and obligations which the member had in the former institute are suspended although the vows remain. Nevertheless, from the beginning of probation, the member is bound to the observance of the proper law of the new institute.
§2. Through profession in the new institute, the member is incorporated into it while the preceding vows, rights, and obligations cease. Art. 2.
Source: Code of Canon Law (Vatican.va)