In a Limited Liability Partnership (LLP), there must be at least two individuals who are partners must act as Designated Partners. These partners must have a Designated Partner Identification Number (DPIN) and, their names must appear in the LLP partner agreement. Partners who are appointed as Designated Partners may be removed or some other individuals may be appointed as Designated Partner.
There is no ceiling on the maximum number of partners. There is also no limitation on joining and leaving an LLP. One can easily join or leave it. The ownership can also be passed on from one person to the other without much problem.