Based on the provided legal document, the assessment of rent does not solely depend on the presence of a formal rental agreement or deed. The document indicates that acceptance of rent by the landlord, even without a written agreement, can be relevant in establishing certain legal positions. However, for the creation of a valid sub-tenancy or for legal recognition of a tenancy, written consent from the landlord is generally required under the applicable rent control laws.

Specifically, the document emphasizes that mere acceptance of rent by the landlord, even if done with knowledge of occupation or subletting, does not automatically establish a lawful tenancy or sub-tenancy if there is no written agreement or consent. The law prioritizes written agreements and explicit consent to validate the tenancy relationship, and the absence of such documentation can undermine the legal assessment of rent and tenancy rights.

In summary, while rent can sometimes be assessed based on payments and acceptance without a formal deed, the legal validity of such arrangements heavily relies on the existence of proper documentation and compliance with statutory requirements. Without a rental agreement or deed, the rent may be difficult to legally assess or enforce, especially in cases involving sub-letting or tenancy disputes.