Requirements to evict the tenant from property for the reason of personal use

Hi,

I recently purchased a house and it's currently rented but I want to move in.

The law says that 1-year eviction notice is needed, but the tenancy contract states that the landlord has the right not to renew the tenancy contract by writing a notice 90 days before expiry.

This contract was signed by the previous owner, so will this be applicable, or do I have to give him a 1-year eviction notice?

The tenancy contract ends on January 15, please advise.

Thanks.