189.This paragraph enables a landlord to extend the probation period to 18 months. This may be relevant where, for example, there is continuing concern about the conduct of a contract-holder. In such a situation a landlord must notify the contract-holder, at least eight weeks before the probation period is due to end that the landlord wishes to extend the period. A contract-holder has a right to ask for a review of this decision to extend under paragraph 5. Paragraph 4 also sets out what information the notice provided to the contract-holder must contain. The Welsh Ministers may by regulations amend the length of the notice period.