Under the Landlord and Tenant Act and statutory implied covenants in Kenyan tenancy law, every tenant is entitled to the covenant of "quiet enjoyment" of the demised premises. A landlord cannot unilaterally alter tenancy terms mid-lease to impose restrictive rules—such as visitor curfews—unless expressly agreed upon in the signed lease agreement or mandated by lawful public authority.
Entertainment and general information, not legal advice. For advice on your own situation, speak to an advocate.