§1. When the period of initial probation has elapsed, a candidate who is judged suitable is to assume the three evangelical counsels strengthened by a sacred bond or is to depart from the institute.
§2. This first incorporation is to be temporary according to the norm of the constitutions; it is not to be less than five years.
§3. When the period of this incorporation has elapsed, the member who is judged suitable is to be admitted to perpetual incorporation or to definitive incorporation, that is, with temporary bonds that are always to be renewed.
§4. Definitive incorporation is equivalent to perpetual incorporation with regard to the specific juridic effects established in the constitutions.
Source: Code of Canon Law (Vatican.va)