2. Unless otherwise stated with a reasonable period of time, the contract is now a periodic rental agreement, which means that your contract works week after week or month by month, depending on how you pay your rent. A rental agreement consists of two types of conditions, explicit and tacit. Here is an overview of the terms of a lease: the lease is a form of consumer agreement and, as such, must be in simple, clear and easy-to-understand language. It must not contain terms that could be “unfair”. This means, for example, that the rental agreement must not put you in an unfavourable situation, allow a party to unilaterally change conditions without a valid reason or irrevocably bind you to conditions with which you have not been able to familiarize yourself. An unfair term is not legally valid and cannot be applied.