Individual contract is recommended for tenants intending to stay in one location for more than 2 years. The lessee can renew the contract indefinitely, but the lessee may incur renewal fees. Legally, the lessor cannot force you to move out unless there are extenuating circumstances; such as, in cases where the lessee breaches the contract's terms and conditions.
Although this contract favors the lessee to stay at the apartment, the lessor can charge a renewal fee and renegotiate rent prices, by a justifiable percent, at the end of the contract. It's always good to check- during the application process- what fees you will incur when renewing the contract.