Do we have to register or incorporate a company to be incubated ?

Do we have to register or incorporate a company to be incubated ?

We have a pre-incubation facility, wherein startups will be given 3 to 6 months time to check if the idea is viable. During the pre-incubation period, the startups need not necessarily be incorporated. For entering into the incubation the startup need to be registered a LLP or a PVT LTD company.